diff --git a/src/main/java/com/apiflows/model/PayoadReplacement.java b/src/main/java/com/apiflows/model/PayoadReplacement.java
new file mode 100644
index 0000000..c30a70b
--- /dev/null
+++ b/src/main/java/com/apiflows/model/PayoadReplacement.java
@@ -0,0 +1,23 @@
+package com.apiflows.model;
+
+public class PayoadReplacement {
+
+    private String target;
+    private String value;
+
+    public String getTarget() {
+        return target;
+    }
+
+    public void setTarget(String target) {
+        this.target = target;
+    }
+
+    public String getValue() {
+        return value;
+    }
+
+    public void setValue(String value) {
+        this.value = value;
+    }
+}
diff --git a/src/main/java/com/apiflows/model/RequestBody.java b/src/main/java/com/apiflows/model/RequestBody.java
new file mode 100644
index 0000000..89e419d
--- /dev/null
+++ b/src/main/java/com/apiflows/model/RequestBody.java
@@ -0,0 +1,32 @@
+package com.apiflows.model;
+
+public class RequestBody {
+
+    private String contentType;
+    private Object payload;
+    private PayoadReplacement payoadReplacement;
+
+    public String getContentType() {
+        return contentType;
+    }
+
+    public void setContentType(String contentType) {
+        this.contentType = contentType;
+    }
+
+    public Object getPayload() {
+        return payload;
+    }
+
+    public void setPayload(Object payload) {
+        this.payload = payload;
+    }
+
+    public PayoadReplacement getPayoadReplacement() {
+        return payoadReplacement;
+    }
+
+    public void setPayoadReplacement(PayoadReplacement payoadReplacement) {
+        this.payoadReplacement = payoadReplacement;
+    }
+}
diff --git a/src/main/java/com/apiflows/model/Step.java b/src/main/java/com/apiflows/model/Step.java
index cf2d274..bd2e9c7 100644
--- a/src/main/java/com/apiflows/model/Step.java
+++ b/src/main/java/com/apiflows/model/Step.java
@@ -10,15 +10,17 @@
 
 public class Step {
 
+    private String description;
     private String stepId;
     private String operationId;
     private String operationPath;
     private Operation operation;
     private String workflowId;
     private Workflow workflow;
-    private String description;
-    private String dependsOn;
     private List<Parameter> parameters = new ArrayList<>();
+
+    private RequestBody requestBody;
+    private String dependsOn;
     private List<Criterion> successCriteria = new ArrayList<>();
     private Map<String, String> outputs = new HashMap<>();
     private List<SuccessAction> onSuccess = new ArrayList<>();
@@ -182,6 +184,19 @@ public Step parameters(List<Parameter> parameters) {
         return this;
     }
 
+    public RequestBody getRequestBody() {
+        return requestBody;
+    }
+
+    public void setRequestBody(RequestBody requestBody) {
+        this.requestBody = requestBody;
+    }
+
+    public Step requestBody(RequestBody requestBody) {
+        this.requestBody = requestBody;
+        return this;
+    }
+
     public Step successCriteria(List<Criterion> successCriteria) {
         this.setSuccessCriteria(successCriteria);
         return this;
diff --git a/src/main/java/com/apiflows/model/Workflow.java b/src/main/java/com/apiflows/model/Workflow.java
index e7f2e0b..eba5413 100644
--- a/src/main/java/com/apiflows/model/Workflow.java
+++ b/src/main/java/com/apiflows/model/Workflow.java
@@ -14,6 +14,13 @@ public class Workflow {
     private String summary;
     private String description;
     private Schema inputs;
+
+    private String dependsOn;
+
+    private List<Parameter> parameters = new ArrayList<>();
+    private List<SuccessAction> successActions = new ArrayList<>();
+    private List<FailureAction> failureActions = new ArrayList<>();
+
     private List<Step> steps = new ArrayList<>();
     private Map<String, String> outputs = new HashMap<>();
 
@@ -95,4 +102,35 @@ public Workflow inputs(Schema inputs) {
         return this;
     }
 
+    public String getDependsOn() {
+        return dependsOn;
+    }
+
+    public void setDependsOn(String dependsOn) {
+        this.dependsOn = dependsOn;
+    }
+
+    public List<Parameter> getParameters() {
+        return parameters;
+    }
+
+    public void setParameters(List<Parameter> parameters) {
+        this.parameters = parameters;
+    }
+
+    public List<SuccessAction> getSuccessActions() {
+        return successActions;
+    }
+
+    public void setSuccessActions(List<SuccessAction> successActions) {
+        this.successActions = successActions;
+    }
+
+    public List<FailureAction> getFailureActions() {
+        return failureActions;
+    }
+
+    public void setFailureActions(List<FailureAction> failureActions) {
+        this.failureActions = failureActions;
+    }
 }