How Can I Get Data From Class Object In Jquery

public class Employee
        {



            public string Subject { get; set; }


            public string SrvcRef { get; set; }
        }
        

     [WebMethod]

    public static List<employee> GetEmployee(string ID)
    {
        

          
           
            SqlCommand cmd = new SqlCommand("....");   
        
            GetData.con.Open();
        List<employee> employees = new List<employee>();

        SqlDataReader dr = cmd.ExecuteReader();
         
         
        while (dr.Read())
        {
            var employee = new Employee
            {
                Subject = dr["Subject"].ToString(),
                SrvcRef = dr["SrvcRef"].ToString()

            };
            employees.Add(employee);
        }  
        //Close Connection
        dr.Close();
        GetData.con.Close();
        return employees;
       

        }

$(document).on("click", "#LoadLocalDialog1", function () {

                    var ID = $("#<%=grdExiRequest.ClientID %> tr").find("td:eq(0)").html();



                    PageMethods.GetEmployee(ID, onSucess);




                    function onSucess(result) {

                        var speed = $(result).data("Subject");


                    }

                    $("#LocalDialogModal").dialog("open");


                });