Does not work for reading enum value for untyped property with odata.type annotated

[xuzhg]

if we post a request using

{
    "name": "sam",
    "gender": "Male",
    "[email protected]":"#UntypedApp.Models.Gender",
    "data": "Male"
}

There's a type annotation for 'data'.

Expected behavior
Shoudl read it as 'Gender.Male' for 'Data' property.

** Actual behavior**
It's failed.

[xuzhg]

It's also failing if we specify a @odata.type for a single resource for 'Data'.