public HttpResponseMessage PostShipmentState(Guid key, ShipmentStateRequestModel requestModel)
{
var createdShipmentState = _shipmentService.AddShipmentState(
key, RetrieveShipmentStatus(requestModel.ShipmentStatus));
if (!createdShipmentState.IsSuccess)
{
return(new HttpResponseMessage(HttpStatusCode.Conflict));
}
var response = Request.CreateResponse(HttpStatusCode.Created,
createdShipmentState.Entity.ToShipmentStateDto());
return(response);
}