clarify id in readme

Fixes https://pagure.io/fm-orchestrator/issue/1723

README.rst

@@ -107,7 +107,8 @@ Module submission is done via posting the modulemd SCM URL.
         "branch": "master"
     }
 
-The response, in case of a successful submission, would include the task ID.
+If successful, the response will be the extended json representation of the new module entry.
+This json dictionary will include the module build ID in the "id" field.
 
 ::
 
@@ -117,7 +118,8 @@ The response, in case of a successful submission, would include the task ID.
 
     {
         "id": 42,
-        "state": "wait",
+        "state": 0,
+        "state_name": "init",
         ...
     }