Problems retrieving data from POST in WCF

Question

So I'm using a WCF service to insert data in a DB, for this purpose I send my data in a POST to my WCF service and collect it using a DataContract as so :

JSON data sent by POST

{ "data": { "subsidiarySid":"0", "storesid":"0", "date":"2018-06-15", "counters": [ { "nation":"France", "count":"5" }, { "nation":"France", "count":"5" } ] } }

The DataContract

[DataContract(Name ="data")]
    public class Count
    {
    [DataMember(Name ="subsidiarySid")]
    public string subsidiarySid;

    [DataMember(Name ="storeSid")]
    public string storeSid;

    [DataMember(Name = "date")]
    public string date;

    [DataMember(Name = "counters")]
    public IEnumerable<Counter> counters;
}

[DataContract]
public class Counter
{
    [DataMember(Name = "nationalitySid")]
    public string nationalitySid;

    [DataMember(Name = "count")]
    public string count;
}

Method in Interface

[OperationContract]
[WebInvoke(Method = "POST", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Wrapped, UriTemplate = "count_customers")]
string PostCount(Count count);

Problem is when I try to access this object I get a null... Is my contract wrong or did I mess something elsewhere? Also can I get rid of the "data{}" at the start of the json (like havig directly my "subsidiarySid etc at the root of the json)?

Answer 1

Found my way after all, so I'm posting it as answer for future reference. What I did was to get the string attributes out of the DataContract (getting them by name in the OperationContract like this:

[OperationContract]
    [WebInvoke(Method = "POST", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Wrapped, UriTemplate = "count_customers")]
    string PostCount(string subsidiarySid, string storeSid, string date, IEnumerable<Counter> counters);

And the DataContract

[DataContract(Name = "counter")]
public class Counter
{
    [DataMember(Name = "nationalitySid")]
    public string nationalitySid;

    [DataMember(Name = "count")]
    public string count;
}

Just removing the "Name" attribute in DataContract definition permitted me to ommit the unnecessary "data:{}" layer.