Syntax for datasource URL handler

i have a grid with a datamanager like:

<e-datamanager url="/Customers/DataSource"
                 insert-url="/Customers/Insert"
                 remove-url="/Customers/Remove"
                 update-url="/Customers/Update"
                 adaptor="UrlAdaptor">

my handler in the controller is

public ActionResult DataSource(DataManager dm)

as it was in mvc5. However, although I can see the params being passed properly from the web page (skip: 0 and take: 12), the properties of the object passed to the DataSource method are 0, so no skip/take happens server-side.

I saw elsewhere that the insert-url et al. have a "CRUDModel<>" wrapper around the param type, which avoids a similar problem there... is there something similar needed for the DataManager?

<ej-grid id="GridContainer"  ..  "           allow-paging="true"           is-responsive="true"           enable-responsive-row="true">      <e-datamanager url="/Home/DataSource" insert-url="/Home/CellEditInsert" update-url="/Home/CellEditUpdate" remove-url="/Home/CellEditDelete" adaptor="UrlAdaptor"></e-datamanager>      ..    </ej-grid>   HomeController.cs  namespace WebApplication8.Controllers  {      public class HomeController : Controller      {          ..    public ActionResult DataSource([FromBody]DataManager dm)          {    // do your operations here          }          public ActionResult CellEditUpdate([FromBody]CRUDModel<Orders> value)          {            // do your operations here          }          public ActionResult CellEditInsert([FromBody]CRUDModel<Orders> value)          {               // do your operations here           }          public ActionResult CellEditDelete([FromBody]CRUDModel<Orders> value)          {                // do your operations here          }      }  }