diff --git a/specification/apimanagement/resource-manager/Microsoft.ApiManagement/preview/2021-12-01-preview/apimcontenttypes.json b/specification/apimanagement/resource-manager/Microsoft.ApiManagement/preview/2021-12-01-preview/apimcontenttypes.json
index b6285d89de9b..d35df8151206 100644
--- a/specification/apimanagement/resource-manager/Microsoft.ApiManagement/preview/2021-12-01-preview/apimcontenttypes.json
+++ b/specification/apimanagement/resource-manager/Microsoft.ApiManagement/preview/2021-12-01-preview/apimcontenttypes.json
@@ -158,6 +158,13 @@
           },
           {
             "$ref": "./apimanagement.json#/parameters/SubscriptionIdParameter"
+          },
+          {
+            "name": "parameters",
+            "in": "body",
+            "schema": {
+              "$ref": "./definitions.json#/definitions/ContentTypeContract"
+            }
           }
         ],
         "responses": {