How to pass json filters to mvc grid without form

Question

I am using ajaxify for refreshing mvc grid.

 $("[data-gridname='testGrid']").gridmvc();
             pageGrids['accountAjaxGrid'].ajaxify(
             {
                 getPagedData: $('#pagingActionUrl').val(),
                 getData: $('#pagingActionUrl').val(),
                 gridFilterForm: $("#gridFilters")
             });

Here '#gridFilters' is a form. But i want to send a json instead of form.