Using Cortex API with .NET (C#) and with Newtonsoft.Json.NET

Hi everybody,
I am starting to use Cortex API from a .NET C# application. I am using ClientWebSocket class in .NET and Newtonsoft.Json.NET for serializing/deserializing the data. If anyone is doing the same thing, we can share here. I was able to connect and get the logged user from the API. Now Working on authorization. Tried anonymous authorization, but did not worked. API returns with the following error/message: -32600/Invalid Request.
Will continue to try different options.