diff --git a/lib/rest/static/decorated/api.github.com.json b/lib/rest/static/decorated/api.github.com.json
index 7d11071230a7..965cdfd5f3af 100644
--- a/lib/rest/static/decorated/api.github.com.json
+++ b/lib/rest/static/decorated/api.github.com.json
@@ -224876,14 +224876,22 @@
               "type": "object",
               "properties": {
                 "content": {
-                  "description": "Content of the file",
+                  "description": "<p>Content of the file</p>",
                   "readOnly": false,
-                  "type": "string"
+                  "type": "string",
+                  "name": "content",
+                  "in": "body",
+                  "rawType": "string",
+                  "rawDescription": "Content of the file",
+                  "isRequired": true,
+                  "childParamsGroups": []
                 }
               },
               "required": [
                 "content"
-              ]
+              ],
+              "rawType": "object",
+              "name": "key"
             },
             "examples": [
               {
@@ -224897,7 +224905,41 @@
             "rawType": "object",
             "rawDescription": "Names and content for the files that make up the gist",
             "isRequired": true,
-            "childParamsGroups": []
+            "childParamsGroups": [
+              {
+                "parentName": "files",
+                "parentType": "object",
+                "id": "files-object",
+                "params": [
+                  {
+                    "description": "<p>A user-defined key to represent an item in <code>files</code>.</p>",
+                    "type": "string",
+                    "name": "key",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "A key to represent an item in files."
+                  }
+                ]
+              },
+              {
+                "parentName": "key",
+                "parentType": "object",
+                "id": "key-object",
+                "params": [
+                  {
+                    "description": "<p>Content of the file</p>",
+                    "readOnly": false,
+                    "type": "string",
+                    "name": "content",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "Content of the file",
+                    "isRequired": true,
+                    "childParamsGroups": []
+                  }
+                ]
+              }
+            ]
           },
           {
             "oneOf": [
@@ -228586,15 +228628,25 @@
               ],
               "properties": {
                 "content": {
-                  "description": "The new content of the file",
-                  "type": "string"
+                  "description": "<p>The new content of the file</p>",
+                  "type": "string",
+                  "name": "content",
+                  "in": "body",
+                  "rawType": "string",
+                  "rawDescription": "The new content of the file",
+                  "childParamsGroups": []
                 },
                 "filename": {
-                  "description": "The new filename for the file",
-                  "type": [
+                  "description": "<p>The new filename for the file</p>",
+                  "type": "string or null",
+                  "name": "filename",
+                  "in": "body",
+                  "rawType": [
                     "string",
                     "null"
-                  ]
+                  ],
+                  "rawDescription": "The new filename for the file",
+                  "childParamsGroups": []
                 }
               },
               "anyOf": [
@@ -228612,7 +228664,9 @@
                   "type": "object",
                   "maxProperties": 0
                 }
-              ]
+              ],
+              "rawType": "object",
+              "name": "key"
             },
             "examples": [
               {
@@ -228627,7 +228681,51 @@
             "rawType": "object",
             "rawDescription": "Names of files to be updated",
             "isRequired": false,
-            "childParamsGroups": []
+            "childParamsGroups": [
+              {
+                "parentName": "files",
+                "parentType": "object",
+                "id": "files-object",
+                "params": [
+                  {
+                    "description": "<p>A user-defined key to represent an item in <code>files</code>.</p>",
+                    "type": "string",
+                    "name": "key",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "A key to represent an item in files."
+                  }
+                ]
+              },
+              {
+                "parentName": "key",
+                "parentType": "object",
+                "id": "key-object",
+                "params": [
+                  {
+                    "description": "<p>The new content of the file</p>",
+                    "type": "string",
+                    "name": "content",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "The new content of the file",
+                    "childParamsGroups": []
+                  },
+                  {
+                    "description": "<p>The new filename for the file</p>",
+                    "type": "string or null",
+                    "name": "filename",
+                    "in": "body",
+                    "rawType": [
+                      "string",
+                      "null"
+                    ],
+                    "rawDescription": "The new filename for the file",
+                    "childParamsGroups": []
+                  }
+                ]
+              }
+            ]
           }
         ],
         "enabledForGitHubApps": false,
diff --git a/lib/rest/static/decorated/ghes-3.1.json b/lib/rest/static/decorated/ghes-3.1.json
index f8fa72a332fb..fede38c4ef95 100644
--- a/lib/rest/static/decorated/ghes-3.1.json
+++ b/lib/rest/static/decorated/ghes-3.1.json
@@ -162644,14 +162644,22 @@
               "type": "object",
               "properties": {
                 "content": {
-                  "description": "Content of the file",
+                  "description": "<p>Content of the file</p>",
                   "readOnly": false,
-                  "type": "string"
+                  "type": "string",
+                  "name": "content",
+                  "in": "body",
+                  "rawType": "string",
+                  "rawDescription": "Content of the file",
+                  "isRequired": true,
+                  "childParamsGroups": []
                 }
               },
               "required": [
                 "content"
-              ]
+              ],
+              "rawType": "object",
+              "name": "key"
             },
             "examples": [
               {
@@ -162665,7 +162673,41 @@
             "rawType": "object",
             "rawDescription": "Names and content for the files that make up the gist",
             "isRequired": true,
-            "childParamsGroups": []
+            "childParamsGroups": [
+              {
+                "parentName": "files",
+                "parentType": "object",
+                "id": "files-object",
+                "params": [
+                  {
+                    "description": "<p>A user-defined key to represent an item in <code>files</code>.</p>",
+                    "type": "string",
+                    "name": "key",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "A key to represent an item in files."
+                  }
+                ]
+              },
+              {
+                "parentName": "key",
+                "parentType": "object",
+                "id": "key-object",
+                "params": [
+                  {
+                    "description": "<p>Content of the file</p>",
+                    "readOnly": false,
+                    "type": "string",
+                    "name": "content",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "Content of the file",
+                    "isRequired": true,
+                    "childParamsGroups": []
+                  }
+                ]
+              }
+            ]
           },
           {
             "oneOf": [
@@ -166354,15 +166396,25 @@
               ],
               "properties": {
                 "content": {
-                  "description": "The new content of the file",
-                  "type": "string"
+                  "description": "<p>The new content of the file</p>",
+                  "type": "string",
+                  "name": "content",
+                  "in": "body",
+                  "rawType": "string",
+                  "rawDescription": "The new content of the file",
+                  "childParamsGroups": []
                 },
                 "filename": {
-                  "description": "The new filename for the file",
-                  "type": [
+                  "description": "<p>The new filename for the file</p>",
+                  "type": "string or null",
+                  "name": "filename",
+                  "in": "body",
+                  "rawType": [
                     "string",
                     "null"
-                  ]
+                  ],
+                  "rawDescription": "The new filename for the file",
+                  "childParamsGroups": []
                 }
               },
               "anyOf": [
@@ -166380,7 +166432,9 @@
                   "type": "object",
                   "maxProperties": 0
                 }
-              ]
+              ],
+              "rawType": "object",
+              "name": "key"
             },
             "examples": [
               {
@@ -166395,7 +166449,51 @@
             "rawType": "object",
             "rawDescription": "Names of files to be updated",
             "isRequired": false,
-            "childParamsGroups": []
+            "childParamsGroups": [
+              {
+                "parentName": "files",
+                "parentType": "object",
+                "id": "files-object",
+                "params": [
+                  {
+                    "description": "<p>A user-defined key to represent an item in <code>files</code>.</p>",
+                    "type": "string",
+                    "name": "key",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "A key to represent an item in files."
+                  }
+                ]
+              },
+              {
+                "parentName": "key",
+                "parentType": "object",
+                "id": "key-object",
+                "params": [
+                  {
+                    "description": "<p>The new content of the file</p>",
+                    "type": "string",
+                    "name": "content",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "The new content of the file",
+                    "childParamsGroups": []
+                  },
+                  {
+                    "description": "<p>The new filename for the file</p>",
+                    "type": "string or null",
+                    "name": "filename",
+                    "in": "body",
+                    "rawType": [
+                      "string",
+                      "null"
+                    ],
+                    "rawDescription": "The new filename for the file",
+                    "childParamsGroups": []
+                  }
+                ]
+              }
+            ]
           }
         ],
         "enabledForGitHubApps": false,
diff --git a/lib/rest/static/decorated/ghes-3.2.json b/lib/rest/static/decorated/ghes-3.2.json
index abc438e1acdb..89cc764df5bd 100644
--- a/lib/rest/static/decorated/ghes-3.2.json
+++ b/lib/rest/static/decorated/ghes-3.2.json
@@ -168387,14 +168387,22 @@
               "type": "object",
               "properties": {
                 "content": {
-                  "description": "Content of the file",
+                  "description": "<p>Content of the file</p>",
                   "readOnly": false,
-                  "type": "string"
+                  "type": "string",
+                  "name": "content",
+                  "in": "body",
+                  "rawType": "string",
+                  "rawDescription": "Content of the file",
+                  "isRequired": true,
+                  "childParamsGroups": []
                 }
               },
               "required": [
                 "content"
-              ]
+              ],
+              "rawType": "object",
+              "name": "key"
             },
             "examples": [
               {
@@ -168408,7 +168416,41 @@
             "rawType": "object",
             "rawDescription": "Names and content for the files that make up the gist",
             "isRequired": true,
-            "childParamsGroups": []
+            "childParamsGroups": [
+              {
+                "parentName": "files",
+                "parentType": "object",
+                "id": "files-object",
+                "params": [
+                  {
+                    "description": "<p>A user-defined key to represent an item in <code>files</code>.</p>",
+                    "type": "string",
+                    "name": "key",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "A key to represent an item in files."
+                  }
+                ]
+              },
+              {
+                "parentName": "key",
+                "parentType": "object",
+                "id": "key-object",
+                "params": [
+                  {
+                    "description": "<p>Content of the file</p>",
+                    "readOnly": false,
+                    "type": "string",
+                    "name": "content",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "Content of the file",
+                    "isRequired": true,
+                    "childParamsGroups": []
+                  }
+                ]
+              }
+            ]
           },
           {
             "oneOf": [
@@ -172097,15 +172139,25 @@
               ],
               "properties": {
                 "content": {
-                  "description": "The new content of the file",
-                  "type": "string"
+                  "description": "<p>The new content of the file</p>",
+                  "type": "string",
+                  "name": "content",
+                  "in": "body",
+                  "rawType": "string",
+                  "rawDescription": "The new content of the file",
+                  "childParamsGroups": []
                 },
                 "filename": {
-                  "description": "The new filename for the file",
-                  "type": [
+                  "description": "<p>The new filename for the file</p>",
+                  "type": "string or null",
+                  "name": "filename",
+                  "in": "body",
+                  "rawType": [
                     "string",
                     "null"
-                  ]
+                  ],
+                  "rawDescription": "The new filename for the file",
+                  "childParamsGroups": []
                 }
               },
               "anyOf": [
@@ -172123,7 +172175,9 @@
                   "type": "object",
                   "maxProperties": 0
                 }
-              ]
+              ],
+              "rawType": "object",
+              "name": "key"
             },
             "examples": [
               {
@@ -172138,7 +172192,51 @@
             "rawType": "object",
             "rawDescription": "Names of files to be updated",
             "isRequired": false,
-            "childParamsGroups": []
+            "childParamsGroups": [
+              {
+                "parentName": "files",
+                "parentType": "object",
+                "id": "files-object",
+                "params": [
+                  {
+                    "description": "<p>A user-defined key to represent an item in <code>files</code>.</p>",
+                    "type": "string",
+                    "name": "key",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "A key to represent an item in files."
+                  }
+                ]
+              },
+              {
+                "parentName": "key",
+                "parentType": "object",
+                "id": "key-object",
+                "params": [
+                  {
+                    "description": "<p>The new content of the file</p>",
+                    "type": "string",
+                    "name": "content",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "The new content of the file",
+                    "childParamsGroups": []
+                  },
+                  {
+                    "description": "<p>The new filename for the file</p>",
+                    "type": "string or null",
+                    "name": "filename",
+                    "in": "body",
+                    "rawType": [
+                      "string",
+                      "null"
+                    ],
+                    "rawDescription": "The new filename for the file",
+                    "childParamsGroups": []
+                  }
+                ]
+              }
+            ]
           }
         ],
         "enabledForGitHubApps": false,
diff --git a/lib/rest/static/decorated/ghes-3.3.json b/lib/rest/static/decorated/ghes-3.3.json
index 7178f4786521..ec10a3b28fe1 100644
--- a/lib/rest/static/decorated/ghes-3.3.json
+++ b/lib/rest/static/decorated/ghes-3.3.json
@@ -168969,14 +168969,22 @@
               "type": "object",
               "properties": {
                 "content": {
-                  "description": "Content of the file",
+                  "description": "<p>Content of the file</p>",
                   "readOnly": false,
-                  "type": "string"
+                  "type": "string",
+                  "name": "content",
+                  "in": "body",
+                  "rawType": "string",
+                  "rawDescription": "Content of the file",
+                  "isRequired": true,
+                  "childParamsGroups": []
                 }
               },
               "required": [
                 "content"
-              ]
+              ],
+              "rawType": "object",
+              "name": "key"
             },
             "examples": [
               {
@@ -168990,7 +168998,41 @@
             "rawType": "object",
             "rawDescription": "Names and content for the files that make up the gist",
             "isRequired": true,
-            "childParamsGroups": []
+            "childParamsGroups": [
+              {
+                "parentName": "files",
+                "parentType": "object",
+                "id": "files-object",
+                "params": [
+                  {
+                    "description": "<p>A user-defined key to represent an item in <code>files</code>.</p>",
+                    "type": "string",
+                    "name": "key",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "A key to represent an item in files."
+                  }
+                ]
+              },
+              {
+                "parentName": "key",
+                "parentType": "object",
+                "id": "key-object",
+                "params": [
+                  {
+                    "description": "<p>Content of the file</p>",
+                    "readOnly": false,
+                    "type": "string",
+                    "name": "content",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "Content of the file",
+                    "isRequired": true,
+                    "childParamsGroups": []
+                  }
+                ]
+              }
+            ]
           },
           {
             "oneOf": [
@@ -172679,15 +172721,25 @@
               ],
               "properties": {
                 "content": {
-                  "description": "The new content of the file",
-                  "type": "string"
+                  "description": "<p>The new content of the file</p>",
+                  "type": "string",
+                  "name": "content",
+                  "in": "body",
+                  "rawType": "string",
+                  "rawDescription": "The new content of the file",
+                  "childParamsGroups": []
                 },
                 "filename": {
-                  "description": "The new filename for the file",
-                  "type": [
+                  "description": "<p>The new filename for the file</p>",
+                  "type": "string or null",
+                  "name": "filename",
+                  "in": "body",
+                  "rawType": [
                     "string",
                     "null"
-                  ]
+                  ],
+                  "rawDescription": "The new filename for the file",
+                  "childParamsGroups": []
                 }
               },
               "anyOf": [
@@ -172705,7 +172757,9 @@
                   "type": "object",
                   "maxProperties": 0
                 }
-              ]
+              ],
+              "rawType": "object",
+              "name": "key"
             },
             "examples": [
               {
@@ -172720,7 +172774,51 @@
             "rawType": "object",
             "rawDescription": "Names of files to be updated",
             "isRequired": false,
-            "childParamsGroups": []
+            "childParamsGroups": [
+              {
+                "parentName": "files",
+                "parentType": "object",
+                "id": "files-object",
+                "params": [
+                  {
+                    "description": "<p>A user-defined key to represent an item in <code>files</code>.</p>",
+                    "type": "string",
+                    "name": "key",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "A key to represent an item in files."
+                  }
+                ]
+              },
+              {
+                "parentName": "key",
+                "parentType": "object",
+                "id": "key-object",
+                "params": [
+                  {
+                    "description": "<p>The new content of the file</p>",
+                    "type": "string",
+                    "name": "content",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "The new content of the file",
+                    "childParamsGroups": []
+                  },
+                  {
+                    "description": "<p>The new filename for the file</p>",
+                    "type": "string or null",
+                    "name": "filename",
+                    "in": "body",
+                    "rawType": [
+                      "string",
+                      "null"
+                    ],
+                    "rawDescription": "The new filename for the file",
+                    "childParamsGroups": []
+                  }
+                ]
+              }
+            ]
           }
         ],
         "enabledForGitHubApps": false,
diff --git a/lib/rest/static/decorated/ghes-3.4.json b/lib/rest/static/decorated/ghes-3.4.json
index be4312a3887a..ff8e105d5658 100644
--- a/lib/rest/static/decorated/ghes-3.4.json
+++ b/lib/rest/static/decorated/ghes-3.4.json
@@ -175158,14 +175158,22 @@
               "type": "object",
               "properties": {
                 "content": {
-                  "description": "Content of the file",
+                  "description": "<p>Content of the file</p>",
                   "readOnly": false,
-                  "type": "string"
+                  "type": "string",
+                  "name": "content",
+                  "in": "body",
+                  "rawType": "string",
+                  "rawDescription": "Content of the file",
+                  "isRequired": true,
+                  "childParamsGroups": []
                 }
               },
               "required": [
                 "content"
-              ]
+              ],
+              "rawType": "object",
+              "name": "key"
             },
             "examples": [
               {
@@ -175179,7 +175187,41 @@
             "rawType": "object",
             "rawDescription": "Names and content for the files that make up the gist",
             "isRequired": true,
-            "childParamsGroups": []
+            "childParamsGroups": [
+              {
+                "parentName": "files",
+                "parentType": "object",
+                "id": "files-object",
+                "params": [
+                  {
+                    "description": "<p>A user-defined key to represent an item in <code>files</code>.</p>",
+                    "type": "string",
+                    "name": "key",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "A key to represent an item in files."
+                  }
+                ]
+              },
+              {
+                "parentName": "key",
+                "parentType": "object",
+                "id": "key-object",
+                "params": [
+                  {
+                    "description": "<p>Content of the file</p>",
+                    "readOnly": false,
+                    "type": "string",
+                    "name": "content",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "Content of the file",
+                    "isRequired": true,
+                    "childParamsGroups": []
+                  }
+                ]
+              }
+            ]
           },
           {
             "oneOf": [
@@ -178868,15 +178910,25 @@
               ],
               "properties": {
                 "content": {
-                  "description": "The new content of the file",
-                  "type": "string"
+                  "description": "<p>The new content of the file</p>",
+                  "type": "string",
+                  "name": "content",
+                  "in": "body",
+                  "rawType": "string",
+                  "rawDescription": "The new content of the file",
+                  "childParamsGroups": []
                 },
                 "filename": {
-                  "description": "The new filename for the file",
-                  "type": [
+                  "description": "<p>The new filename for the file</p>",
+                  "type": "string or null",
+                  "name": "filename",
+                  "in": "body",
+                  "rawType": [
                     "string",
                     "null"
-                  ]
+                  ],
+                  "rawDescription": "The new filename for the file",
+                  "childParamsGroups": []
                 }
               },
               "anyOf": [
@@ -178894,7 +178946,9 @@
                   "type": "object",
                   "maxProperties": 0
                 }
-              ]
+              ],
+              "rawType": "object",
+              "name": "key"
             },
             "examples": [
               {
@@ -178909,7 +178963,51 @@
             "rawType": "object",
             "rawDescription": "Names of files to be updated",
             "isRequired": false,
-            "childParamsGroups": []
+            "childParamsGroups": [
+              {
+                "parentName": "files",
+                "parentType": "object",
+                "id": "files-object",
+                "params": [
+                  {
+                    "description": "<p>A user-defined key to represent an item in <code>files</code>.</p>",
+                    "type": "string",
+                    "name": "key",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "A key to represent an item in files."
+                  }
+                ]
+              },
+              {
+                "parentName": "key",
+                "parentType": "object",
+                "id": "key-object",
+                "params": [
+                  {
+                    "description": "<p>The new content of the file</p>",
+                    "type": "string",
+                    "name": "content",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "The new content of the file",
+                    "childParamsGroups": []
+                  },
+                  {
+                    "description": "<p>The new filename for the file</p>",
+                    "type": "string or null",
+                    "name": "filename",
+                    "in": "body",
+                    "rawType": [
+                      "string",
+                      "null"
+                    ],
+                    "rawDescription": "The new filename for the file",
+                    "childParamsGroups": []
+                  }
+                ]
+              }
+            ]
           }
         ],
         "enabledForGitHubApps": false,
diff --git a/lib/rest/static/decorated/github.ae.json b/lib/rest/static/decorated/github.ae.json
index 0f99d56b515c..ea7920414956 100644
--- a/lib/rest/static/decorated/github.ae.json
+++ b/lib/rest/static/decorated/github.ae.json
@@ -163917,14 +163917,22 @@
               "type": "object",
               "properties": {
                 "content": {
-                  "description": "Content of the file",
+                  "description": "<p>Content of the file</p>",
                   "readOnly": false,
-                  "type": "string"
+                  "type": "string",
+                  "name": "content",
+                  "in": "body",
+                  "rawType": "string",
+                  "rawDescription": "Content of the file",
+                  "isRequired": true,
+                  "childParamsGroups": []
                 }
               },
               "required": [
                 "content"
-              ]
+              ],
+              "rawType": "object",
+              "name": "key"
             },
             "examples": [
               {
@@ -163938,7 +163946,41 @@
             "rawType": "object",
             "rawDescription": "Names and content for the files that make up the gist",
             "isRequired": true,
-            "childParamsGroups": []
+            "childParamsGroups": [
+              {
+                "parentName": "files",
+                "parentType": "object",
+                "id": "files-object",
+                "params": [
+                  {
+                    "description": "<p>A user-defined key to represent an item in <code>files</code>.</p>",
+                    "type": "string",
+                    "name": "key",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "A key to represent an item in files."
+                  }
+                ]
+              },
+              {
+                "parentName": "key",
+                "parentType": "object",
+                "id": "key-object",
+                "params": [
+                  {
+                    "description": "<p>Content of the file</p>",
+                    "readOnly": false,
+                    "type": "string",
+                    "name": "content",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "Content of the file",
+                    "isRequired": true,
+                    "childParamsGroups": []
+                  }
+                ]
+              }
+            ]
           },
           {
             "oneOf": [
@@ -167627,15 +167669,25 @@
               ],
               "properties": {
                 "content": {
-                  "description": "The new content of the file",
-                  "type": "string"
+                  "description": "<p>The new content of the file</p>",
+                  "type": "string",
+                  "name": "content",
+                  "in": "body",
+                  "rawType": "string",
+                  "rawDescription": "The new content of the file",
+                  "childParamsGroups": []
                 },
                 "filename": {
-                  "description": "The new filename for the file",
-                  "type": [
+                  "description": "<p>The new filename for the file</p>",
+                  "type": "string or null",
+                  "name": "filename",
+                  "in": "body",
+                  "rawType": [
                     "string",
                     "null"
-                  ]
+                  ],
+                  "rawDescription": "The new filename for the file",
+                  "childParamsGroups": []
                 }
               },
               "anyOf": [
@@ -167653,7 +167705,9 @@
                   "type": "object",
                   "maxProperties": 0
                 }
-              ]
+              ],
+              "rawType": "object",
+              "name": "key"
             },
             "examples": [
               {
@@ -167668,7 +167722,51 @@
             "rawType": "object",
             "rawDescription": "Names of files to be updated",
             "isRequired": false,
-            "childParamsGroups": []
+            "childParamsGroups": [
+              {
+                "parentName": "files",
+                "parentType": "object",
+                "id": "files-object",
+                "params": [
+                  {
+                    "description": "<p>A user-defined key to represent an item in <code>files</code>.</p>",
+                    "type": "string",
+                    "name": "key",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "A key to represent an item in files."
+                  }
+                ]
+              },
+              {
+                "parentName": "key",
+                "parentType": "object",
+                "id": "key-object",
+                "params": [
+                  {
+                    "description": "<p>The new content of the file</p>",
+                    "type": "string",
+                    "name": "content",
+                    "in": "body",
+                    "rawType": "string",
+                    "rawDescription": "The new content of the file",
+                    "childParamsGroups": []
+                  },
+                  {
+                    "description": "<p>The new filename for the file</p>",
+                    "type": "string or null",
+                    "name": "filename",
+                    "in": "body",
+                    "rawType": [
+                      "string",
+                      "null"
+                    ],
+                    "rawDescription": "The new filename for the file",
+                    "childParamsGroups": []
+                  }
+                ]
+              }
+            ]
           }
         ],
         "enabledForGitHubApps": false,
diff --git a/script/rest/utils/operation.js b/script/rest/utils/operation.js
index fbe268dba8b1..3ad716800f61 100644
--- a/script/rest/utils/operation.js
+++ b/script/rest/utils/operation.js
@@ -314,7 +314,51 @@ async function getBodyParams(paramsObject, requiredParams) {
       param.description = await renderContent(param.description)
       // there may be zero, one, or multiple object parameters that have children parameters
       param.childParamsGroups = []
-      const childParamsGroup = await getChildParamsGroup(param)
+      let childParamsGroup
+
+      // When additionalProperties is defined with a type of `object`
+      // the input parameter is a dictionary. This handles cases for
+      // a dictionary. We don't have any list cases yet, and when
+      // the type is `string` we don't need to render additional rows of
+      // parameters.
+      // https://swagger.io/docs/specification/data-models/dictionaries/
+
+      // This conditional accounts for additionalProperties of type object
+      // and [null, 'object']
+      if (
+        param.additionalProperties &&
+        (param.additionalProperties.type === 'object' ||
+          (Array.isArray(param.additionalProperties.type) &&
+            param.additionalProperties.type.includes('object')))
+      ) {
+        // Add the first element which will always be the user-defined key
+        slugger.reset()
+        const id = slugger.slug(`${param.name}-${param.type}`)
+        param.childParamsGroups.push({
+          parentName: param.name,
+          parentType: param.type,
+          id,
+          params: [
+            {
+              description: `<p>A user-defined key to represent an item in <code>${param.name}</code>.</p>`,
+              type: 'string',
+              name: 'key',
+              in: 'body',
+              rawType: 'string',
+              rawDescription: `A key to represent an item in ${param.name}.`,
+            },
+          ],
+        })
+
+        // Construct a new parameter using the child properties set in
+        // additionalProperties.
+        const newParam = param.additionalProperties
+        newParam.rawType = 'object'
+        newParam.name = 'key'
+        childParamsGroup = await getChildParamsGroup(newParam)
+      } else {
+        childParamsGroup = await getChildParamsGroup(param)
+      }
 
       if (childParamsGroup && childParamsGroup.params.length) {
         param.childParamsGroups.push(childParamsGroup)