public ActionResult RatesList(GridCommand command)
        {
            int totalCount;
            var data = _shippingByWeightService.GetShippingByWeightModels(command.Page - 1, command.PageSize, out totalCount);

            var model = new GridModel <ShippingByWeightModel>
            {
                Data  = data,
                Total = totalCount
            };

            return(new JsonResult
            {
                Data = model
            });
        }