Deserialize JSON to Dictionary with DataContractJsonSerializer

I receive the following JSON result int the response:

{"result": { "":-41.41, "ABC":0.07, "XYZ":0.00, "Test":0.00 }}

I've prepared the following class for deserializating:

[DataContract]
public sealed class RpcResponse
{
    [DataMember(Name = "result")]
    public List<KeyValuePair<string, decimal>> Result { get; set; }
}

However when I'm tring to deserialize it with DataContractJsonSerializer the Result property ends up with having zero entries. (Also doesn't work when declaring Result as Dictionary<string, decimal>)

Is there a way to perform this with DataContractJsonSerializer?