Deserialize Key:Value pairs to Dictionary - serialization

Question

I am working on deserializing data passed to a Microsoft Web API in MVC4 RC into objects of the following class:
public class EditorCreateEditSubmission
{
public string action { get; set; }
public string table { get; set; }
public string id { get; set; }
public Dictionary<string, string> data { get; set; }
}
Whenever a Web API method gets data which should map to the EditorCreateEditSubmission, the "data" field is empty, like so:
(It's okay for Table and ID to be empty)
My controller method:
public EditorServerResponse Post(EditorCreateEditSubmission ajaxSubmission)
{
//...Handle data
}
The raw header:
POST http://localhost:64619/API/Species HTTP/1.1
Accept: application/json, text/javascript, */*; q=0.01
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Referer: http://localhost:64619/Manage/Species
Accept-Language: en-us
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: localhost:64619
Content-Length: 134
Connection: Keep-Alive
Pragma: no-cache
action=create&table=&id=&data%5Bamu%5D=1&data%5BchemicalFormula%5D=H&data%5BcommonName%5D=Hydrogen&data%5Bstatus%5D=N&data%5Bnotes%5D=
More readable view:
action create
table
id
data[amu] 1
data[chemicalFormula] H
data[commonName] Hydrogen
data[status] N
data[notes]
Do I need to manually create a class with get/set values every possible set of incoming values? It seems like deserialization of this data into a Dictionary should be straightforward, but I'm having some difficulty finding examples inthe new RC release of Microsoft's MVC4.

Answer 1

I don't think that the FormUrlEncodedMediaTypeFormatter does handle this.