public async Task <IHttpActionResult> Create([FromBody] dynamic viewmodel)
{
string flat = viewmodel.flat;
int? count = viewmodel.count;
var flatViewModel = JsonConvert.DeserializeObject <FlatViewModel>(flat);
var model = Mapper.Map <Flat>(flatViewModel);
var result = await _flatService.Create(model, count);
return(Ok(Mapper.Map <FlatViewModel>(result)));
}