public HttpResponseMessage Post(HttpRequestMessage request, Fan f)
        {
            return(CreateHttpResponse(request, () =>
            {
                HttpResponseMessage response = null;
                if (ModelState.IsValid)
                {
                    request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
                }
                else
                {
                    var fan = _fanService.Add(f);
                    _fanService.SaveChanges();

                    response = request.CreateResponse(HttpStatusCode.Created, fan);
                }
                return response;
            }));
        }