diff --git a/app/Http/Api/Controllers/AuthorController.php b/app/Http/Api/Controllers/AuthorController.php
new file mode 100644
index 0000000..605729d
--- /dev/null
+++ b/app/Http/Api/Controllers/AuthorController.php
@@ -0,0 +1,102 @@
+<?php
+
+namespace App\Http\Api\Controllers;
+
+use App\Http\Api\Requests\AuthorListRequest;
+use App\Http\Api\Requests\StoreAuthorRequest;
+use App\Http\Api\Requests\UpdateAuthorRequest;
+use App\Http\Api\Resources\AuthorResource;
+use App\Http\Controllers\Controller;
+use App\Models\Author;
+use App\Repositories\Parameters\FindAuthorParameters;
+use App\Repositories\AuthorRepository;
+use App\Repositories\Parameters\StoreAuthorParameters;
+use App\Repositories\Parameters\UpdateAuthorParameters;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Resources\Json\AnonymousResourceCollection;
+use Symfony\Component\HttpFoundation\Response as HttpFoundationResponse;
+use Throwable;
+
+class AuthorController extends Controller
+{
+    public function index(AuthorListRequest $request): AnonymousResourceCollection
+    {
+        $data = $request->validated();
+
+        $parameters = new FindAuthorParameters(
+            name: $data['name'] ?? null,
+            sort: $data['sort'] ?? null,
+            page: $data['page'] ?? null,
+            perPage: $data['perPage'] ?? null,
+            withSongsCount: true
+        );
+
+        $repository = app(AuthorRepository::class);
+
+        $authors = $repository->find($parameters);
+
+        return AuthorResource::collection($authors);
+    }
+
+    public function show(Author $author): AuthorResource
+    {
+        $author->loadCount('songs');
+
+        return new AuthorResource($author);
+    }
+
+    public function store(StoreAuthorRequest $request): AuthorResource
+    {
+        $data = $request->validated();
+
+        $parameters = new StoreAuthorParameters(
+            name: $data['name'],
+            foundationYear: $data['foundation_year'],
+            website: $data['website'] ?? null
+        );
+
+        $repository = app(AuthorRepository::class);
+
+        try {
+            $author = $repository->store($parameters);
+        } catch (Throwable $exception) {
+            abort(HttpFoundationResponse::HTTP_INTERNAL_SERVER_ERROR, $exception->getMessage());
+        }
+
+        return new AuthorResource($author);
+    }
+
+    public function update(UpdateAuthorRequest $request, Author $author): AuthorResource
+    {
+        $data = $request->validated();
+
+        $parameters = new UpdateAuthorParameters(
+            name: $data['name'] ?? null,
+            foundationYear: $data['foundation_year'] ?? null,
+            website: $data['website'] ?? null
+        );
+
+        $repository = app(AuthorRepository::class);
+
+        try {
+            $author = $repository->update($author, $parameters);
+        } catch (Throwable $exception) {
+            abort(HttpFoundationResponse::HTTP_INTERNAL_SERVER_ERROR, $exception->getMessage());
+        }
+
+        return new AuthorResource($author);
+    }
+
+    public function delete(Author $author): JsonResponse
+    {
+        $repository = app(AuthorRepository::class);
+
+        try {
+            $repository->delete($author);
+        } catch (Throwable $exception) {
+            abort(HttpFoundationResponse::HTTP_INTERNAL_SERVER_ERROR, $exception->getMessage());
+        }
+
+        return response()->json(['message' => __('messages.deleted_successfully')]);
+    }
+}
diff --git a/app/Http/Api/Controllers/SongController.php b/app/Http/Api/Controllers/SongController.php
new file mode 100644
index 0000000..795c90c
--- /dev/null
+++ b/app/Http/Api/Controllers/SongController.php
@@ -0,0 +1,111 @@
+<?php
+
+namespace App\Http\Api\Controllers;
+
+use App\Http\Api\Requests\StoreSongRequest;
+use App\Http\Api\Requests\UpdateSongRequest;
+use App\Http\Api\Resources\SongResource;
+use App\Http\Controllers\Controller;
+use App\Http\Api\Requests\SongListRequest;
+use App\Models\Song;
+use App\Repositories\Parameters\FindSongParameters;
+use App\Repositories\Parameters\StoreSongParameters;
+use App\Repositories\Parameters\UpdateSongParameters;
+use App\Repositories\SongRepository;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Resources\Json\AnonymousResourceCollection;
+use Symfony\Component\HttpFoundation\Response as HttpFoundationResponse;
+use Throwable;
+
+class SongController extends Controller
+{
+    public function index(SongListRequest $request): AnonymousResourceCollection
+    {
+        $data = $request->validated();
+
+        $parameters = new FindSongParameters(
+            title: $data['title'] ?? null,
+            authorId: $data['author_id'] ?? null,
+            albumId: $data['album_id'] ?? null,
+            sort: $data['sort'] ?? null,
+            page: $data['page'] ?? 1,
+            perPage: $data['per_page'] ?? 10,
+            withGenre: true
+        );
+
+        $repository = app(SongRepository::class);
+
+        $songs = $repository->find($parameters);
+
+        return SongResource::collection($songs);
+    }
+
+    public function show(Song $song): SongResource
+    {
+        $song->load('genre');
+
+        return new SongResource($song);
+    }
+
+    public function store(StoreSongRequest $request): SongResource
+    {
+        $data = $request->validated();
+
+        $parameters = new StoreSongParameters(
+            title: $data['title'],
+            durationInSeconds: $data['duration_in_seconds'],
+            authorId: $data['author_id'],
+            albumId: $data['album_id'],
+            genreId: $data['genre_id']
+        );
+
+        $repository = app(SongRepository::class);
+
+        try {
+            $song = $repository->store($parameters);
+        } catch (Throwable $exception) {
+            abort(HttpFoundationResponse::HTTP_INTERNAL_SERVER_ERROR, $exception->getMessage());
+        }
+
+        return new SongResource($song);
+    }
+
+    public function update(UpdateSongRequest $request, Song $song): SongResource
+    {
+        $data = $request->validated();
+
+        $parameters = new UpdateSongParameters(
+            title: $data['title'] ?? null,
+            durationInSeconds: $data['duration_in_seconds'] ?? null,
+            authorId: $data['author_id'] ?? null,
+            albumId: $data['album_id'] ?? null,
+            genreId: $data['genre_id'] ?? null
+        );
+
+        $repository = app(SongRepository::class);
+
+        try {
+            $song = $repository->update(
+                song: $song,
+                parameters: $parameters
+            );
+        } catch (Throwable $exception) {
+            abort(HttpFoundationResponse::HTTP_INTERNAL_SERVER_ERROR, $exception->getMessage());
+        }
+
+        return new SongResource($song);
+    }
+
+    public function delete(Song $song): JsonResponse
+    {
+        $repository = app(SongRepository::class);
+
+        try {
+            $repository->delete($song);
+        } catch (Throwable $exception) {
+            abort(HttpFoundationResponse::HTTP_INTERNAL_SERVER_ERROR, $exception->getMessage());
+        }
+
+        return response()->json(['message' => __('messages.deleted_successfully')]);
+    }
+}
diff --git a/app/Http/Api/Requests/AuthorListRequest.php b/app/Http/Api/Requests/AuthorListRequest.php
new file mode 100644
index 0000000..075c031
--- /dev/null
+++ b/app/Http/Api/Requests/AuthorListRequest.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Http\Api\Requests;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class AuthorListRequest extends FormRequest
+{
+    public function rules(): array
+    {
+        return [
+            'name'     => [
+                'sometimes',
+                'string',
+            ],
+            'sort'     => [
+                'sometimes',
+                'string',
+                'in:songs_count,foundation_year',
+            ],
+            'page'     => [
+                'sometimes',
+                'integer',
+                'min:1',
+            ],
+            'per_page' => [
+                'sometimes',
+                'integer',
+                'min:10',
+                'max:25',
+            ],
+        ];
+    }
+}
diff --git a/app/Http/Api/Requests/SongListRequest.php b/app/Http/Api/Requests/SongListRequest.php
new file mode 100644
index 0000000..3959b07
--- /dev/null
+++ b/app/Http/Api/Requests/SongListRequest.php
@@ -0,0 +1,46 @@
+<?php
+
+namespace App\Http\Api\Requests;
+
+use App\Models\Album;
+use App\Models\Author;
+use Illuminate\Foundation\Http\FormRequest;
+
+class SongListRequest extends FormRequest
+{
+    public function rules(): array
+    {
+        return [
+            'title'     => [
+                'sometimes',
+                'string',
+            ],
+            'author_id' => [
+                'sometimes',
+                'integer',
+                'exists:' . Author::class . ',id',
+            ],
+            'album_id'  => [
+                'sometimes',
+                'integer',
+                'exists:' . Album::class . ',id',
+            ],
+            'sort'      => [
+                'sometimes',
+                'string',
+                'in:title,duration_in_seconds,genre_id',
+            ],
+            'page'      => [
+                'sometimes',
+                'integer',
+                'min:1',
+            ],
+            'per_page'  => [
+                'sometimes',
+                'integer',
+                'min:10',
+                'max:25',
+            ],
+        ];
+    }
+}
diff --git a/app/Http/Api/Requests/StoreAuthorRequest.php b/app/Http/Api/Requests/StoreAuthorRequest.php
new file mode 100644
index 0000000..b229c2f
--- /dev/null
+++ b/app/Http/Api/Requests/StoreAuthorRequest.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Http\Api\Requests;
+
+use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Support\Carbon;
+
+class StoreAuthorRequest extends FormRequest
+{
+    public function rules(): array
+    {
+        return [
+            'name'            => [
+                'required',
+                'string',
+            ],
+            'foundation_year' => [
+                'required',
+                'integer',
+                'min:1700',
+                'max:' . Carbon::now()->year,
+            ],
+            'website'         => [
+                'sometimes',
+                'url'
+            ],
+        ];
+    }
+}
diff --git a/app/Http/Api/Requests/StoreSongRequest.php b/app/Http/Api/Requests/StoreSongRequest.php
new file mode 100644
index 0000000..5dbb48b
--- /dev/null
+++ b/app/Http/Api/Requests/StoreSongRequest.php
@@ -0,0 +1,41 @@
+<?php
+
+namespace App\Http\Api\Requests;
+
+use App\Models\Album;
+use App\Models\Author;
+use App\Models\Genre;
+use Illuminate\Foundation\Http\FormRequest;
+
+class StoreSongRequest extends FormRequest
+{
+    public function rules(): array
+    {
+        return [
+            'title'               => [
+                'required',
+                'string',
+            ],
+            'duration_in_seconds' => [
+                'required',
+                'integer',
+                'min:1'
+            ],
+            'author_id'           => [
+                'required',
+                'integer',
+                'exists:' . Author::class . ',id',
+            ],
+            'album_id'            => [
+                'required',
+                'integer',
+                'exists:' . Album::class . ',id',
+            ],
+            'genre_id'            => [
+                'required',
+                'integer',
+                'exists:' . Genre::class . ',id',
+            ],
+        ];
+    }
+}
diff --git a/app/Http/Api/Requests/UpdateAuthorRequest.php b/app/Http/Api/Requests/UpdateAuthorRequest.php
new file mode 100644
index 0000000..8cae26d
--- /dev/null
+++ b/app/Http/Api/Requests/UpdateAuthorRequest.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Http\Api\Requests;
+
+use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Support\Carbon;
+
+class UpdateAuthorRequest extends FormRequest
+{
+    public function rules(): array
+    {
+        return [
+            'name'            => [
+                'sometimes',
+                'string',
+            ],
+            'foundation_year' => [
+                'sometimes',
+                'integer',
+                'min:1700',
+                'max:' . Carbon::now()->year,
+            ],
+            'website'         => [
+                'sometimes',
+                'url'
+            ],
+        ];
+    }
+}
diff --git a/app/Http/Api/Requests/UpdateSongRequest.php b/app/Http/Api/Requests/UpdateSongRequest.php
new file mode 100644
index 0000000..16ae23d
--- /dev/null
+++ b/app/Http/Api/Requests/UpdateSongRequest.php
@@ -0,0 +1,41 @@
+<?php
+
+namespace App\Http\Api\Requests;
+
+use App\Models\Album;
+use App\Models\Author;
+use App\Models\Genre;
+use Illuminate\Foundation\Http\FormRequest;
+
+class UpdateSongRequest extends FormRequest
+{
+    public function rules(): array
+    {
+        return [
+            'title'               => [
+                'sometimes',
+                'string',
+            ],
+            'duration_in_seconds' => [
+                'sometimes',
+                'integer',
+                'min:1'
+            ],
+            'author_id'           => [
+                'sometimes',
+                'integer',
+                'exists:' . Author::class . ',id',
+            ],
+            'album_id'            => [
+                'sometimes',
+                'integer',
+                'exists:' . Album::class . ',id',
+            ],
+            'genre_id'            => [
+                'sometimes',
+                'integer',
+                'exists:' . Genre::class . ',id',
+            ],
+        ];
+    }
+}
diff --git a/app/Http/Api/Resources/AuthorResource.php b/app/Http/Api/Resources/AuthorResource.php
new file mode 100644
index 0000000..c0281e7
--- /dev/null
+++ b/app/Http/Api/Resources/AuthorResource.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Http\Api\Resources;
+
+use App\Models\Author;
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
+
+/**
+ * @property Author $resource
+ */
+class AuthorResource extends JsonResource
+{
+    public function __construct(Author $resource)
+    {
+        parent::__construct($resource);
+    }
+
+    public function toArray(Request $request): array
+    {
+        return [
+            'id'              => $this->resource->id,
+            'name'            => $this->resource->name,
+            'foundation_year' => $this->resource->foundation_year,
+            'songs_count'     => $this->resource->songs_count ?? 0,
+            'website'         => $this->resource->website,
+        ];
+    }
+}
diff --git a/app/Http/Api/Resources/SongResource.php b/app/Http/Api/Resources/SongResource.php
new file mode 100644
index 0000000..1d10c64
--- /dev/null
+++ b/app/Http/Api/Resources/SongResource.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace App\Http\Api\Resources;
+
+use App\Models\Song;
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
+
+/**
+ * @property Song $resource
+ */
+class SongResource extends JsonResource
+{
+    public function __construct(Song $resource)
+    {
+        parent::__construct($resource);
+    }
+
+    public function toArray(Request $request): array
+    {
+        return [
+            'id'                  => $this->resource->id,
+            'title'               => $this->resource->title,
+            'duration_in_seconds' => $this->resource->duration_in_seconds,
+            'genre_id'            => $this->resource->genre_id,
+            'genre'               => $this->resource->genre->title,
+            'author_id'           => $this->resource->author_id,
+            'album_id'            => $this->resource->album_id,
+        ];
+    }
+}
diff --git a/app/Models/Album.php b/app/Models/Album.php
new file mode 100644
index 0000000..022d3ea
--- /dev/null
+++ b/app/Models/Album.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace App\Models;
+
+use Eloquent;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Support\Carbon;
+use Illuminate\Support\Collection;
+
+/**
+ * @property int                        $id
+ * @property string                     $title
+ * @property int                        $author_id
+ * @property Carbon|null                $created_at
+ * @property Carbon|null                $updated_at
+ * @property-read Author                $author
+ * @property-read Collection<int, Song> $songs
+ * @property-read int|null              $songs_count
+ * @method static Builder<static>|Album newModelQuery()
+ * @method static Builder<static>|Album newQuery()
+ * @method static Builder<static>|Album query()
+ * @method static Builder<static>|Album whereAuthorId($value)
+ * @method static Builder<static>|Album whereCreatedAt($value)
+ * @method static Builder<static>|Album whereId($value)
+ * @method static Builder<static>|Album whereTitle($value)
+ * @method static Builder<static>|Album whereUpdatedAt($value)
+ * @mixin Eloquent
+ */
+class Album extends Model
+{
+    public function author(): BelongsTo
+    {
+        return $this->belongsTo(Author::class);
+    }
+
+    public function songs(): HasMany
+    {
+        return $this->hasMany(Song::class);
+    }
+}
diff --git a/app/Models/Author.php b/app/Models/Author.php
new file mode 100644
index 0000000..a66c9ce
--- /dev/null
+++ b/app/Models/Author.php
@@ -0,0 +1,45 @@
+<?php
+
+namespace App\Models;
+
+use Eloquent;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Support\Carbon;
+use Illuminate\Support\Collection;
+
+/**
+ * @property int                         $id
+ * @property string                      $name
+ * @property int                         $foundation_year
+ * @property string|null                 $website
+ * @property Carbon|null                 $created_at
+ * @property Carbon|null                 $updated_at
+ * @property-read Collection<int, Album> $albums
+ * @property-read int|null               $albums_count
+ * @property-read Collection<int, Song>  $songs
+ * @property-read int|null               $songs_count
+ * @method static Builder<static>|Author newModelQuery()
+ * @method static Builder<static>|Author newQuery()
+ * @method static Builder<static>|Author query()
+ * @method static Builder<static>|Author whereCreatedAt($value)
+ * @method static Builder<static>|Author whereFoundationYear($value)
+ * @method static Builder<static>|Author whereId($value)
+ * @method static Builder<static>|Author whereName($value)
+ * @method static Builder<static>|Author whereUpdatedAt($value)
+ * @method static Builder<static>|Author whereWebsite($value)
+ * @mixin Eloquent
+ */
+class Author extends Model
+{
+    public function albums(): HasMany
+    {
+        return $this->hasMany(Album::class);
+    }
+
+    public function songs(): HasMany
+    {
+        return $this->hasMany(Song::class);
+    }
+}
diff --git a/app/Models/Genre.php b/app/Models/Genre.php
new file mode 100644
index 0000000..174ac48
--- /dev/null
+++ b/app/Models/Genre.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Models;
+
+use Eloquent;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Support\Carbon;
+use Illuminate\Support\Collection;
+
+/**
+ * @property int                        $id
+ * @property string                     $title
+ * @property Carbon|null                $created_at
+ * @property Carbon|null                $updated_at
+ * @property-read Collection<int, Song> $songs
+ * @property-read int|null              $songs_count
+ * @method static Builder<static>|Genre newModelQuery()
+ * @method static Builder<static>|Genre newQuery()
+ * @method static Builder<static>|Genre query()
+ * @method static Builder<static>|Genre whereCreatedAt($value)
+ * @method static Builder<static>|Genre whereId($value)
+ * @method static Builder<static>|Genre whereTitle($value)
+ * @method static Builder<static>|Genre whereUpdatedAt($value)
+ * @mixin Eloquent
+ */
+class Genre extends Model
+{
+    public function songs(): HasMany
+    {
+        return $this->hasMany(Song::class);
+    }
+}
diff --git a/app/Models/Song.php b/app/Models/Song.php
new file mode 100644
index 0000000..0884fb0
--- /dev/null
+++ b/app/Models/Song.php
@@ -0,0 +1,52 @@
+<?php
+
+namespace App\Models;
+
+use Eloquent;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Support\Carbon;
+
+/**
+ * @property int         $id
+ * @property string      $title
+ * @property int         $duration_in_seconds
+ * @property int         $album_id
+ * @property int         $author_id
+ * @property int         $genre_id
+ * @property Carbon|null $created_at
+ * @property Carbon|null $updated_at
+ * @property-read Album  $album
+ * @property-read Author $author
+ * @property-read Genre  $genre
+ * @method static Builder<static>|Song newModelQuery()
+ * @method static Builder<static>|Song newQuery()
+ * @method static Builder<static>|Song query()
+ * @method static Builder<static>|Song whereAlbumId($value)
+ * @method static Builder<static>|Song whereAuthorId($value)
+ * @method static Builder<static>|Song whereCreatedAt($value)
+ * @method static Builder<static>|Song whereDurationInSeconds($value)
+ * @method static Builder<static>|Song whereGenreId($value)
+ * @method static Builder<static>|Song whereId($value)
+ * @method static Builder<static>|Song whereTitle($value)
+ * @method static Builder<static>|Song whereUpdatedAt($value)
+ * @mixin Eloquent
+ */
+class Song extends Model
+{
+    public function genre(): BelongsTo
+    {
+        return $this->belongsTo(Genre::class);
+    }
+
+    public function album(): BelongsTo
+    {
+        return $this->belongsTo(Album::class);
+    }
+
+    public function author(): BelongsTo
+    {
+        return $this->belongsTo(Author::class);
+    }
+}
diff --git a/app/Repositories/AuthorRepository.php b/app/Repositories/AuthorRepository.php
new file mode 100644
index 0000000..9ec375c
--- /dev/null
+++ b/app/Repositories/AuthorRepository.php
@@ -0,0 +1,72 @@
+<?php
+
+namespace App\Repositories;
+
+use App\Models\Author;
+use App\Repositories\Parameters\FindAuthorParameters;
+use App\Repositories\Parameters\StoreAuthorParameters;
+use App\Repositories\Parameters\UpdateAuthorParameters;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Pagination\LengthAwarePaginator;
+use Throwable;
+
+class AuthorRepository
+{
+    public function find(FindAuthorParameters $parameters): LengthAwarePaginator
+    {
+        return Author::query()
+            ->when($parameters->withSongsCount, fn(Builder $query) => $query->withCount('songs'))
+            ->when($parameters->name, fn(Builder $query) => $query->where('name', 'like', "%$parameters->name%"))
+            ->when($parameters->sort, fn (Builder $query) => $query->orderBy($parameters->sort))
+            ->paginate(perPage: $parameters->perPage, page: $parameters->page);
+    }
+
+    /**
+     * @throws Throwable
+     */
+    public function store(StoreAuthorParameters $parameters): Author
+    {
+        $author = new Author();
+
+        $author->name            = $parameters->name;
+        $author->foundation_year = $parameters->foundationYear;
+
+        if (!is_null($parameters->website)) {
+            $author->website = $parameters->website;
+        }
+
+        $author->saveOrFail();
+
+        return $author;
+    }
+
+    /**
+     * @throws Throwable
+     */
+    public function update(Author $author, UpdateAuthorParameters $parameters): Author
+    {
+        if (!is_null($parameters->name)) {
+            $author->name = $parameters->name;
+        }
+
+        if (!is_null($parameters->foundationYear)) {
+            $author->foundation_year = $parameters->foundationYear;
+        }
+
+        if (!is_null($parameters->website)) {
+            $author->website = $parameters->website;
+        }
+
+        $author->saveOrFail();
+
+        return $author;
+    }
+
+    /**
+     * @throws Throwable
+     */
+    public function delete(Author $author): void
+    {
+        $author->deleteOrFail();
+    }
+}
diff --git a/app/Repositories/Parameters/FindAuthorParameters.php b/app/Repositories/Parameters/FindAuthorParameters.php
new file mode 100644
index 0000000..be56c82
--- /dev/null
+++ b/app/Repositories/Parameters/FindAuthorParameters.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace App\Repositories\Parameters;
+
+readonly class FindAuthorParameters
+{
+    public function __construct(
+        public ?string $name,
+        public ?string $sort,
+        public ?int $page,
+        public ?int $perPage,
+        public bool $withSongsCount = false,
+    ){
+    }
+}
diff --git a/app/Repositories/Parameters/FindSongParameters.php b/app/Repositories/Parameters/FindSongParameters.php
new file mode 100644
index 0000000..2fdea3a
--- /dev/null
+++ b/app/Repositories/Parameters/FindSongParameters.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace App\Repositories\Parameters;
+
+readonly class FindSongParameters
+{
+    public function __construct(
+        public ?string $title,
+        public ?int $authorId,
+        public ?int $albumId,
+        public ?string $sort,
+        public ?int $page,
+        public ?int $perPage,
+        public bool $withGenre = false,
+        public bool $withAlbum = false,
+        public bool $withAuthor = false,
+    ){
+    }
+}
diff --git a/app/Repositories/Parameters/StoreAuthorParameters.php b/app/Repositories/Parameters/StoreAuthorParameters.php
new file mode 100644
index 0000000..acb2d25
--- /dev/null
+++ b/app/Repositories/Parameters/StoreAuthorParameters.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace App\Repositories\Parameters;
+
+readonly class StoreAuthorParameters
+{
+    public function __construct(
+        public string $name,
+        public int $foundationYear,
+        public ?string $website
+    ){
+    }
+}
diff --git a/app/Repositories/Parameters/StoreSongParameters.php b/app/Repositories/Parameters/StoreSongParameters.php
new file mode 100644
index 0000000..febf90a
--- /dev/null
+++ b/app/Repositories/Parameters/StoreSongParameters.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace App\Repositories\Parameters;
+
+readonly class StoreSongParameters
+{
+    public function __construct(
+        public string $title,
+        public int $durationInSeconds,
+        public int $authorId,
+        public int $albumId,
+        public int $genreId,
+    ){
+    }
+}
diff --git a/app/Repositories/Parameters/UpdateAuthorParameters.php b/app/Repositories/Parameters/UpdateAuthorParameters.php
new file mode 100644
index 0000000..5801675
--- /dev/null
+++ b/app/Repositories/Parameters/UpdateAuthorParameters.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace App\Repositories\Parameters;
+
+readonly class UpdateAuthorParameters
+{
+    public function __construct(
+        public ?string $name,
+        public ?int $foundationYear,
+        public ?string $website
+    ){
+    }
+}
diff --git a/app/Repositories/Parameters/UpdateSongParameters.php b/app/Repositories/Parameters/UpdateSongParameters.php
new file mode 100644
index 0000000..82f80de
--- /dev/null
+++ b/app/Repositories/Parameters/UpdateSongParameters.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace App\Repositories\Parameters;
+
+readonly class UpdateSongParameters
+{
+    public function __construct(
+        public ?string $title,
+        public ?int $durationInSeconds,
+        public ?int $authorId,
+        public ?int $albumId,
+        public ?int $genreId,
+    ){
+    }
+}
diff --git a/app/Repositories/SongRepository.php b/app/Repositories/SongRepository.php
new file mode 100644
index 0000000..4351546
--- /dev/null
+++ b/app/Repositories/SongRepository.php
@@ -0,0 +1,83 @@
+<?php
+
+namespace App\Repositories;
+
+use App\Models\Song;
+use App\Repositories\Parameters\FindSongParameters;
+use App\Repositories\Parameters\StoreSongParameters;
+use App\Repositories\Parameters\UpdateSongParameters;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Pagination\LengthAwarePaginator;
+use Throwable;
+
+class SongRepository
+{
+    public function find(FindSongParameters $parameters): LengthAwarePaginator
+    {
+        return Song::query()
+            ->when($parameters->withGenre, fn(Builder $query) => $query->with('genre'))
+            ->when($parameters->withAlbum, fn(Builder $query) => $query->with('album'))
+            ->when($parameters->withAuthor, fn(Builder $query) => $query->with('author'))
+            ->when($parameters->title, fn(Builder $query) => $query->where('title', 'like', "%$parameters->title%"))
+            ->when($parameters->albumId, fn(Builder $query) => $query->where('album_id', $parameters->albumId))
+            ->when($parameters->authorId, fn(Builder $query) => $query->where('author_id', $parameters->authorId))
+            ->when($parameters->sort, fn (Builder $query) => $query->orderBy($parameters->sort))
+            ->paginate(perPage: $parameters->perPage, page: $parameters->page);
+    }
+
+    /**
+     * @throws Throwable
+     */
+    public function store(StoreSongParameters $parameters): Song
+    {
+        $song = new Song();
+
+        $song->title               = $parameters->title;
+        $song->duration_in_seconds = $parameters->durationInSeconds;
+        $song->album_id            = $parameters->albumId;
+        $song->author_id           = $parameters->authorId;
+        $song->genre_id            = $parameters->genreId;
+
+        $song->saveOrFail();
+
+        return $song;
+    }
+
+    /**
+     * @throws Throwable
+     */
+    public function update(Song $song, UpdateSongParameters $parameters): Song
+    {
+        if (!is_null($parameters->title)) {
+            $song->title = $parameters->title;
+        }
+
+        if (!is_null($parameters->durationInSeconds)) {
+            $song->duration_in_seconds = $parameters->durationInSeconds;
+        }
+
+        if (!is_null($parameters->albumId)) {
+            $song->album_id = $parameters->albumId;
+        }
+
+        if (!is_null($parameters->authorId)) {
+            $song->author_id = $parameters->authorId;
+        }
+
+        if (!is_null($parameters->genreId)) {
+            $song->genre_id = $parameters->genreId;
+        }
+
+        $song->saveOrFail();
+
+        return $song;
+    }
+
+    /**
+     * @throws Throwable
+     */
+    public function delete(Song $song): void
+    {
+        $song->deleteOrFail();
+    }
+}
diff --git a/bootstrap/app.php b/bootstrap/app.php
index c183276..d8fd845 100644
--- a/bootstrap/app.php
+++ b/bootstrap/app.php
@@ -9,6 +9,7 @@
         web: __DIR__.'/../routes/web.php',
         commands: __DIR__.'/../routes/console.php',
         health: '/up',
+        api: __DIR__.'/../routes/api.php',
     )
     ->withMiddleware(function (Middleware $middleware): void {
         //
diff --git a/database/migrations/2025_10_02_085059_create_authors_table.php b/database/migrations/2025_10_02_085059_create_authors_table.php
new file mode 100644
index 0000000..af3f898
--- /dev/null
+++ b/database/migrations/2025_10_02_085059_create_authors_table.php
@@ -0,0 +1,24 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('authors', function (Blueprint $table) {
+            $table->id();
+            $table->string('name')->index();
+            $table->integer('foundation_year');
+            $table->string('website')->nullable();
+            $table->timestamps();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('authors');
+    }
+};
diff --git a/database/migrations/2025_10_02_085200_create_albums_table.php b/database/migrations/2025_10_02_085200_create_albums_table.php
new file mode 100644
index 0000000..b36df07
--- /dev/null
+++ b/database/migrations/2025_10_02_085200_create_albums_table.php
@@ -0,0 +1,27 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('albums', function (Blueprint $table) {
+            $table->id();
+            $table->string('title');
+
+            $table->foreignId('author_id')
+                  ->constrained()
+                  ->cascadeOnDelete();
+
+            $table->timestamps();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('albums');
+    }
+};
diff --git a/database/migrations/2025_10_02_085256_create_genres_table.php b/database/migrations/2025_10_02_085256_create_genres_table.php
new file mode 100644
index 0000000..55ab5c2
--- /dev/null
+++ b/database/migrations/2025_10_02_085256_create_genres_table.php
@@ -0,0 +1,22 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('genres', function (Blueprint $table) {
+            $table->id();
+            $table->string('title');
+            $table->timestamps();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('genres');
+    }
+};
diff --git a/database/migrations/2025_10_02_085311_create_songs_table.php b/database/migrations/2025_10_02_085311_create_songs_table.php
new file mode 100644
index 0000000..412c033
--- /dev/null
+++ b/database/migrations/2025_10_02_085311_create_songs_table.php
@@ -0,0 +1,36 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('songs', function (Blueprint $table) {
+            $table->id();
+            $table->string('title')->index();
+            $table->integer('duration_in_seconds');
+
+            $table->foreignId('album_id')
+                  ->constrained()
+                  ->cascadeOnDelete();
+
+            $table->foreignId('author_id')
+                  ->constrained()
+                  ->cascadeOnDelete();
+
+            $table->foreignId('genre_id')
+                  ->constrained()
+                  ->cascadeOnDelete();
+
+            $table->timestamps();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('songs');
+    }
+};
diff --git a/lang/en/auth.php b/lang/en/auth.php
new file mode 100644
index 0000000..6598e2c
--- /dev/null
+++ b/lang/en/auth.php
@@ -0,0 +1,20 @@
+<?php
+
+return [
+
+    /*
+    |--------------------------------------------------------------------------
+    | Authentication Language Lines
+    |--------------------------------------------------------------------------
+    |
+    | The following language lines are used during authentication for various
+    | messages that we need to display to the user. You are free to modify
+    | these language lines according to your application's requirements.
+    |
+    */
+
+    'failed' => 'These credentials do not match our records.',
+    'password' => 'The provided password is incorrect.',
+    'throttle' => 'Too many login attempts. Please try again in :seconds seconds.',
+
+];
diff --git a/lang/en/messages.php b/lang/en/messages.php
new file mode 100644
index 0000000..baa559b
--- /dev/null
+++ b/lang/en/messages.php
@@ -0,0 +1,5 @@
+<?php
+
+return [
+    'deleted_successfully' => 'Deleted successfully',
+];
diff --git a/lang/en/pagination.php b/lang/en/pagination.php
new file mode 100644
index 0000000..d481411
--- /dev/null
+++ b/lang/en/pagination.php
@@ -0,0 +1,19 @@
+<?php
+
+return [
+
+    /*
+    |--------------------------------------------------------------------------
+    | Pagination Language Lines
+    |--------------------------------------------------------------------------
+    |
+    | The following language lines are used by the paginator library to build
+    | the simple pagination links. You are free to change them to anything
+    | you want to customize your views to better match your application.
+    |
+    */
+
+    'previous' => '&laquo; Previous',
+    'next' => 'Next &raquo;',
+
+];
diff --git a/lang/en/passwords.php b/lang/en/passwords.php
new file mode 100644
index 0000000..fad3a7d
--- /dev/null
+++ b/lang/en/passwords.php
@@ -0,0 +1,22 @@
+<?php
+
+return [
+
+    /*
+    |--------------------------------------------------------------------------
+    | Password Reset Language Lines
+    |--------------------------------------------------------------------------
+    |
+    | The following language lines are the default lines which match reasons
+    | that are given by the password broker for a password update attempt
+    | outcome such as failure due to an invalid password / reset token.
+    |
+    */
+
+    'reset' => 'Your password has been reset.',
+    'sent' => 'We have emailed your password reset link.',
+    'throttled' => 'Please wait before retrying.',
+    'token' => 'This password reset token is invalid.',
+    'user' => "We can't find a user with that email address.",
+
+];
diff --git a/lang/en/validation.php b/lang/en/validation.php
new file mode 100644
index 0000000..bd9cc11
--- /dev/null
+++ b/lang/en/validation.php
@@ -0,0 +1,199 @@
+<?php
+
+return [
+
+    /*
+    |--------------------------------------------------------------------------
+    | Validation Language Lines
+    |--------------------------------------------------------------------------
+    |
+    | The following language lines contain the default error messages used by
+    | the validator class. Some of these rules have multiple versions such
+    | as the size rules. Feel free to tweak each of these messages here.
+    |
+    */
+
+    'accepted' => 'The :attribute field must be accepted.',
+    'accepted_if' => 'The :attribute field must be accepted when :other is :value.',
+    'active_url' => 'The :attribute field must be a valid URL.',
+    'after' => 'The :attribute field must be a date after :date.',
+    'after_or_equal' => 'The :attribute field must be a date after or equal to :date.',
+    'alpha' => 'The :attribute field must only contain letters.',
+    'alpha_dash' => 'The :attribute field must only contain letters, numbers, dashes, and underscores.',
+    'alpha_num' => 'The :attribute field must only contain letters and numbers.',
+    'any_of' => 'The :attribute field is invalid.',
+    'array' => 'The :attribute field must be an array.',
+    'ascii' => 'The :attribute field must only contain single-byte alphanumeric characters and symbols.',
+    'before' => 'The :attribute field must be a date before :date.',
+    'before_or_equal' => 'The :attribute field must be a date before or equal to :date.',
+    'between' => [
+        'array' => 'The :attribute field must have between :min and :max items.',
+        'file' => 'The :attribute field must be between :min and :max kilobytes.',
+        'numeric' => 'The :attribute field must be between :min and :max.',
+        'string' => 'The :attribute field must be between :min and :max characters.',
+    ],
+    'boolean' => 'The :attribute field must be true or false.',
+    'can' => 'The :attribute field contains an unauthorized value.',
+    'confirmed' => 'The :attribute field confirmation does not match.',
+    'contains' => 'The :attribute field is missing a required value.',
+    'current_password' => 'The password is incorrect.',
+    'date' => 'The :attribute field must be a valid date.',
+    'date_equals' => 'The :attribute field must be a date equal to :date.',
+    'date_format' => 'The :attribute field must match the format :format.',
+    'decimal' => 'The :attribute field must have :decimal decimal places.',
+    'declined' => 'The :attribute field must be declined.',
+    'declined_if' => 'The :attribute field must be declined when :other is :value.',
+    'different' => 'The :attribute field and :other must be different.',
+    'digits' => 'The :attribute field must be :digits digits.',
+    'digits_between' => 'The :attribute field must be between :min and :max digits.',
+    'dimensions' => 'The :attribute field has invalid image dimensions.',
+    'distinct' => 'The :attribute field has a duplicate value.',
+    'doesnt_contain' => 'The :attribute field must not contain any of the following: :values.',
+    'doesnt_end_with' => 'The :attribute field must not end with one of the following: :values.',
+    'doesnt_start_with' => 'The :attribute field must not start with one of the following: :values.',
+    'email' => 'The :attribute field must be a valid email address.',
+    'ends_with' => 'The :attribute field must end with one of the following: :values.',
+    'enum' => 'The selected :attribute is invalid.',
+    'exists' => 'The selected :attribute is invalid.',
+    'extensions' => 'The :attribute field must have one of the following extensions: :values.',
+    'file' => 'The :attribute field must be a file.',
+    'filled' => 'The :attribute field must have a value.',
+    'gt' => [
+        'array' => 'The :attribute field must have more than :value items.',
+        'file' => 'The :attribute field must be greater than :value kilobytes.',
+        'numeric' => 'The :attribute field must be greater than :value.',
+        'string' => 'The :attribute field must be greater than :value characters.',
+    ],
+    'gte' => [
+        'array' => 'The :attribute field must have :value items or more.',
+        'file' => 'The :attribute field must be greater than or equal to :value kilobytes.',
+        'numeric' => 'The :attribute field must be greater than or equal to :value.',
+        'string' => 'The :attribute field must be greater than or equal to :value characters.',
+    ],
+    'hex_color' => 'The :attribute field must be a valid hexadecimal color.',
+    'image' => 'The :attribute field must be an image.',
+    'in' => 'The selected :attribute is invalid.',
+    'in_array' => 'The :attribute field must exist in :other.',
+    'in_array_keys' => 'The :attribute field must contain at least one of the following keys: :values.',
+    'integer' => 'The :attribute field must be an integer.',
+    'ip' => 'The :attribute field must be a valid IP address.',
+    'ipv4' => 'The :attribute field must be a valid IPv4 address.',
+    'ipv6' => 'The :attribute field must be a valid IPv6 address.',
+    'json' => 'The :attribute field must be a valid JSON string.',
+    'list' => 'The :attribute field must be a list.',
+    'lowercase' => 'The :attribute field must be lowercase.',
+    'lt' => [
+        'array' => 'The :attribute field must have less than :value items.',
+        'file' => 'The :attribute field must be less than :value kilobytes.',
+        'numeric' => 'The :attribute field must be less than :value.',
+        'string' => 'The :attribute field must be less than :value characters.',
+    ],
+    'lte' => [
+        'array' => 'The :attribute field must not have more than :value items.',
+        'file' => 'The :attribute field must be less than or equal to :value kilobytes.',
+        'numeric' => 'The :attribute field must be less than or equal to :value.',
+        'string' => 'The :attribute field must be less than or equal to :value characters.',
+    ],
+    'mac_address' => 'The :attribute field must be a valid MAC address.',
+    'max' => [
+        'array' => 'The :attribute field must not have more than :max items.',
+        'file' => 'The :attribute field must not be greater than :max kilobytes.',
+        'numeric' => 'The :attribute field must not be greater than :max.',
+        'string' => 'The :attribute field must not be greater than :max characters.',
+    ],
+    'max_digits' => 'The :attribute field must not have more than :max digits.',
+    'mimes' => 'The :attribute field must be a file of type: :values.',
+    'mimetypes' => 'The :attribute field must be a file of type: :values.',
+    'min' => [
+        'array' => 'The :attribute field must have at least :min items.',
+        'file' => 'The :attribute field must be at least :min kilobytes.',
+        'numeric' => 'The :attribute field must be at least :min.',
+        'string' => 'The :attribute field must be at least :min characters.',
+    ],
+    'min_digits' => 'The :attribute field must have at least :min digits.',
+    'missing' => 'The :attribute field must be missing.',
+    'missing_if' => 'The :attribute field must be missing when :other is :value.',
+    'missing_unless' => 'The :attribute field must be missing unless :other is :value.',
+    'missing_with' => 'The :attribute field must be missing when :values is present.',
+    'missing_with_all' => 'The :attribute field must be missing when :values are present.',
+    'multiple_of' => 'The :attribute field must be a multiple of :value.',
+    'not_in' => 'The selected :attribute is invalid.',
+    'not_regex' => 'The :attribute field format is invalid.',
+    'numeric' => 'The :attribute field must be a number.',
+    'password' => [
+        'letters' => 'The :attribute field must contain at least one letter.',
+        'mixed' => 'The :attribute field must contain at least one uppercase and one lowercase letter.',
+        'numbers' => 'The :attribute field must contain at least one number.',
+        'symbols' => 'The :attribute field must contain at least one symbol.',
+        'uncompromised' => 'The given :attribute has appeared in a data leak. Please choose a different :attribute.',
+    ],
+    'present' => 'The :attribute field must be present.',
+    'present_if' => 'The :attribute field must be present when :other is :value.',
+    'present_unless' => 'The :attribute field must be present unless :other is :value.',
+    'present_with' => 'The :attribute field must be present when :values is present.',
+    'present_with_all' => 'The :attribute field must be present when :values are present.',
+    'prohibited' => 'The :attribute field is prohibited.',
+    'prohibited_if' => 'The :attribute field is prohibited when :other is :value.',
+    'prohibited_if_accepted' => 'The :attribute field is prohibited when :other is accepted.',
+    'prohibited_if_declined' => 'The :attribute field is prohibited when :other is declined.',
+    'prohibited_unless' => 'The :attribute field is prohibited unless :other is in :values.',
+    'prohibits' => 'The :attribute field prohibits :other from being present.',
+    'regex' => 'The :attribute field format is invalid.',
+    'required' => 'The :attribute field is required.',
+    'required_array_keys' => 'The :attribute field must contain entries for: :values.',
+    'required_if' => 'The :attribute field is required when :other is :value.',
+    'required_if_accepted' => 'The :attribute field is required when :other is accepted.',
+    'required_if_declined' => 'The :attribute field is required when :other is declined.',
+    'required_unless' => 'The :attribute field is required unless :other is in :values.',
+    'required_with' => 'The :attribute field is required when :values is present.',
+    'required_with_all' => 'The :attribute field is required when :values are present.',
+    'required_without' => 'The :attribute field is required when :values is not present.',
+    'required_without_all' => 'The :attribute field is required when none of :values are present.',
+    'same' => 'The :attribute field must match :other.',
+    'size' => [
+        'array' => 'The :attribute field must contain :size items.',
+        'file' => 'The :attribute field must be :size kilobytes.',
+        'numeric' => 'The :attribute field must be :size.',
+        'string' => 'The :attribute field must be :size characters.',
+    ],
+    'starts_with' => 'The :attribute field must start with one of the following: :values.',
+    'string' => 'The :attribute field must be a string.',
+    'timezone' => 'The :attribute field must be a valid timezone.',
+    'unique' => 'The :attribute has already been taken.',
+    'uploaded' => 'The :attribute failed to upload.',
+    'uppercase' => 'The :attribute field must be uppercase.',
+    'url' => 'The :attribute field must be a valid URL.',
+    'ulid' => 'The :attribute field must be a valid ULID.',
+    'uuid' => 'The :attribute field must be a valid UUID.',
+
+    /*
+    |--------------------------------------------------------------------------
+    | Custom Validation Language Lines
+    |--------------------------------------------------------------------------
+    |
+    | Here you may specify custom validation messages for attributes using the
+    | convention "attribute.rule" to name the lines. This makes it quick to
+    | specify a specific custom language line for a given attribute rule.
+    |
+    */
+
+    'custom' => [
+        'attribute-name' => [
+            'rule-name' => 'custom-message',
+        ],
+    ],
+
+    /*
+    |--------------------------------------------------------------------------
+    | Custom Validation Attributes
+    |--------------------------------------------------------------------------
+    |
+    | The following language lines are used to swap our attribute placeholder
+    | with something more reader friendly such as "E-Mail Address" instead
+    | of "email". This simply helps us make our message more expressive.
+    |
+    */
+
+    'attributes' => [],
+
+];
diff --git a/lang/ru/messages.php b/lang/ru/messages.php
new file mode 100644
index 0000000..ba5d31d
--- /dev/null
+++ b/lang/ru/messages.php
@@ -0,0 +1,5 @@
+<?php
+
+return [
+    'deleted_successfully' => 'Успешно удалено',
+];
diff --git a/routes/api.php b/routes/api.php
new file mode 100644
index 0000000..a556fa2
--- /dev/null
+++ b/routes/api.php
@@ -0,0 +1,20 @@
+<?php
+
+use App\Http\Api\Controllers\AuthorController;
+use App\Http\Api\Controllers\SongController;
+
+Route::prefix('authors')->group(function (){
+    Route::get('/{author}', [AuthorController::class, 'show']);
+    Route::get('/', [AuthorController::class, 'index']);
+    Route::post('/', [AuthorController::class, 'store']);
+    Route::put('/{author}', [AuthorController::class, 'update']);
+    Route::delete('/{author}', [AuthorController::class, 'delete']);
+});
+
+Route::prefix('songs')->group(function (){
+    Route::get('/{song}', [SongController::class, 'show']);
+    Route::get('/', [SongController::class, 'index']);
+    Route::post('/', [SongController::class, 'store']);
+    Route::put('/{song}', [SongController::class, 'update']);
+    Route::delete('/{song}', [SongController::class, 'delete']);
+});