add simple request body

openapi.yaml

@@ -12,6 +12,11 @@ paths:
       operationId: Example
       parameters:
         - $ref: "#/components/parameters/HeaderParam"
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/ExampleBody'
       responses:
         '200':
           description: example
@@ -24,3 +29,9 @@ components:
       schema:
         type: string
   responses: {}
+  schemas:
+    ExampleBody:
+      type: object
+      properties:
+        field:
+          type: string