Getting empty list when passing data through ajax in asp.net core

I am sending list data from view to controller through ajax, data is showing correctly, but receiving empty list of object in controller. Here is my Code snippet.

Here is My java script code:-

//Collect Multiple List For Pass To Controller
    $("#btnSubmit").click(function (e) {
        e.preventDefault();
       // NavContinue();

        var _data = [];
        $.each($("#gridTable tbody tr"), function () {
            _data.push({
                ItemDescription: $(this).find('td:eq(1)').find('input').val(),
                ItemCode: $(this).find('td:eq(2)').find('select').val(),
                Quantity: $(this).find('td:eq(3)').find('input').val(),
                
            });
        });

        var data = JSON.stringify({
            abc : _data
        });
        console.log(data);
        $.when(Save(data)).then(function (response) {
            console.log(response);
        }).fail(function (err) {
            console.log(err);
        });
    });

    //After Click Save Button Pass All Data View To Controller For Save Database
    function Save(abc) {
        alert(abc);
        return $.ajax({
             contentType: 'application/json; charset=utf-8',
            //contentType: 'application/x-www-form-urlencoded; charset=UTF-8',
            dataType: 'json',
            type: 'POST',
            url: "/controller/save",
            data: abc,
            success: function (result) {
                if (result) {
                    alert(result);
                }
                else {
                    location.reload();
                }
            }
        });
    }

Here my Model:-

 public class abc
    {
        public string ItemDescription { get; set; }
        public int ItemCode { get; set; }
        public int Quantity { get; set; }

    }

here is my controller:-

 [HttpPost]
    public JsonResult save(abc[] model)
    {
        var response = model;
        return Json(true);
    }

If some one helps me, it will be very appreciated