How to update single row values in EJ2 grid control

function evaluate() {
 
            var form = $('#__AjaxAntiForgeryForm');
            var token = $('input[name="__RequestVerificationToken"]', form).val();
 
            var grid = document.getElementById("OrderHistoryGrid").ej2_instances[0];
            if (grid.getSelectedRowIndexes().length) {
 
                let selectedRow = grid.getSelectedRowIndexes()[0];
                let selectedRec = grid.getSelectedRecords()[0];
              
                $.ajax({
                    url: "/Orders/EvaluateOrder",
                    type: "POST",
                    data: {
                        __RequestVerificationToken: token,
                        orderData: selectedRec
                    },
                    success: function (data) {

                           ====== What to write here ? =====                     

                    },
                    error: function (jqXHR) {

                        alert("Error: can't evaluate: " + jqXHR.responseText)
                    }
                });
            } else {
                alert("No records selected.");
            }

          }

public class HomeController : Controller
{
    public static List<Orders> order = new List<Orders>();
 
    public ActionResult Index()

Just in case, my object is like this:

public class OrderHistory
    {
        public OrderHistory() { }
 
        public OrderHistory(int orderId, DateTime dateTimeUtc)
        {
            OrderId = orderId;
            DateTimeUtcTicks = dateTimeUtc.Ticks;
        }
 
        [Key]
        public int Id { get; set; }
 
        [Index("IX_OrderIdAndDate", Order = 0, IsUnique = true)]
        public int OrderId { get; set; }
        public Order Order { get; set; }
 
        [Index("IX_OrderIdAndDate", Order = 1, IsUnique = true)]
        public long DateTimeUtcTicks { get; set; }
 
        [NotMapped]
        public string DateTimeUtcTicksString
        {
            get
            {
                return DateTimeUtcTicks.ToString();
            }
            set
            {
                DateTimeUtcTicks = Convert.ToInt64(value);
            }
        }
 
        [NotMapped]
        public DateTime DateTimeUtc { get { return new DateTime(DateTimeUtcTicks, DateTimeKind.Utc); } }
 
        public bool AlreadyExistedInDb { get; set; }
 
        public string ShippingParametersChanges { get; set; }
        public bool ShippingParametersChanged { get { return !string.IsNullOrWhiteSpace(ShippingParametersChanges); } }
 
        public bool ShippingQuoteRequested { get; set; }
        public bool ShippingQuoteReceived { get; set; }
        public string ShippingQuoteError { get; set; }
 
        public List<ShippingService> ProposedShippingServices { get; set; }
 
        public string PreviousServiceCode { get; set; }
        public string NewServiceCode { get; set; }
 
        public bool NewServiceCodeSentToApi { get; set; }
        public bool NewServiceCodeApplied { get; set; }
        public string NewServiceCodeError { get; set; }
    }

Thank you