Convert Web API Json response to Entity Collection

HttpResponseMessage response = httpClient.GetAsync(ConfigurationManager.AppSettings["ServerAddress"] + "api/data/v8.0/" + uri, HttpCompletionOption.ResponseHeadersRead).Result;
            JObject responseObject = new JObject();
            if (response.IsSuccessStatusCode)
            {
                responseObject = JObject.Parse(response.Content.ReadAsStringAsync().Result);

 dynamic systemUserObject = JsonConvert.DeserializeObject(jRetrieveResponse.ToString());

                foreach (var data in systemUserObject.value)
                {
               var contactType= data.contacttype.Value;
                }
         
            }