how to pass json data in jquery to wcf service

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WCFServices

Type = "GET";
            // Url = "http://localhost:12344/SecondaryToPrimaryRESTful.svc/JSON/GetClientDetailFromPrimary/" + $("#txtTokenNumber").val() + "/" + $("#txtMobileNo").val();
             //Url = "http://localhost:12344/SecondaryToPrimaryRESTful.svc/JSON/GetClientDetailFromPrimary/MobileID/09898345474";
            Url = "http://localhost:12344/SecondaryToPrimaryRESTful.svc/JSON/GetClientDetailFromPrimary";
            //  Data = '{"tokenid": "' + TokenID + '","MobileNo":"' + MobileNo + '"}';
            //  Data = '{"MobileNo":"' + MobileNo + '"}';
            var Data = { "GetClientDetailFromPrimary": { "tokenid": "" + TokenID + "", "MobileNo": "" + MobileNo + ""} };
            Data = JSON.stringify(Data);

            ContentType = "application/json; charset=utf-8";
            DataType = "json";
            ProcessData = true;
            CallService();

[WebInvoke(Method = "GET", RequestFormat =WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json, UriTemplate = "/GetClientDetailFromPrimary/{tokenid}/{MobileNo}", BodyStyle = WebMessageBodyStyle.WrappedRequest)]
public Stream GetClientDetailFromPrimary(string tokenid, string MobileNo)
{

WebClient proxy = new WebClient();
byte[] abc = proxy.DownloadData((new Uri("http://localhost:12346/PrimaryRestfulToDb.svc/JSON/GetClientData" + "/" + MobileNo)));
Stream strm = new MemoryStream(abc);
//DataContractSerializer obj = new DataContractSerializer(typeof(string));
//string result = obj.ReadObject(strm).ToString();
return strm;
}