HttpClient + GUID Create Record Mscrm C#

 HttpClient httpClient = GetHttp().Result;

            //var appSettings = ConfigurationManager.AppSettings;

            String apiUrl = "https://ORG.crm4.dynamics.com/api/data/v9.1/";

            JObject idea = new JObject();

  idea.Add("admin_BusinessPoint@odata.bind","/systemusers("+ getUserGuid.Result.ToString().Replace("}","").Replace("{","") + ")");

PASS CRM FIELD INSTED LOGICAL NAME