var client = new RestClient("http://public.coindaddy.io:4000/api/");
                client.Timeout = -1;
                var request = new RestRequest(Method.POST);
                request.AddHeader("Content-Type", "application/json; charset=UTF-8");
                request.AddHeader("Accept", "application/json, text/javascript");
                request.AddHeader("Authorization", "Basic cnBjOjEyMzQ=");

                string payload = "{ \"method\": \"get_holders\",\"params\": {\"asset\": \"" + token + "\"},\"jsonrpc\": \"2.0\",\"id\": 0}";
                request.AddParameter("application/json; charset=UTF-8", payload, ParameterType.RequestBody);
                IRestResponse response = client.Execute(request);



Inspecting the Request Object Post Call
{Content-Type=application/json; charset=UTF-8}
{Accept=application/json, text/javascript}
{Authorization=Basic cnBjOjEyMzQ=}
{application/json; charset=UTF-8={ "method": "get_holders","params": {"asset": "VICEPEPE"},"jsonrpc": "2.0","id": 0}}