kendo dataSource initial filter

HTML

<script src="http://cdn.kendostatic.com/2012.1.515/js/kendo.all.min.js"></script>
<link rel="stylesheet" href="http://cdn.kendostatic.com/2012.1.322/styles/kendo.common.min.css">
<link rel="stylesheet" href="http://cdn.kendostatic.com/2012.1.322/styles/kendo.default.min.css">
<div id="grid"></div>

JavaScript

var dataSource;

$.ajax({
    url: "/echo/json/",
    dataType: "json",
    type: "POST",
    data: {
        // /echo/json/ echoes the JSON which you pass as an argument
        json: JSON.stringify([
            { field: "foo", operator: "eq", value: 1}, 
            { field: "bar", operator: "eq", value: "a"},
             {field: "fo1", operator: "eq", value: "b"}
        ])
    },
    success: function(data) {
        //create filters
        var filters = data;
        //init dataSource + grid
        gridInit(filters);
    }
});

function gridInit(filters) {
    kendo.culture("en-US");
    dataSource = new kendo.data.DataSource({
        schema: {
            model: {
                id: "foo",
                fields: {
                    foo: {type: "number"},
                    bar: {type: "string"},
                    fo1: {type: "number"},
                    isEditable: {type: "boolean"}
                }
            }
        },
        transport: {
            read: {
                //using jsfiddle echo service to simulate JSON endpoint
                url: "/echo/json/",
                dataType: "json",
                type: "POST",
                data: {
                    // /echo/json/ echoes the JSON which you pass as an argument
                    json: JSON.stringify([
                        { foo: 1, bar: "a", fo1: "$300" },
                        { foo: 2, bar: "b", fo1: "$400"},
                        { foo: 3, bar: "c", fo1: "$500"}
                    ])
                }
            },
            update: {
                url: "test"
            }
        },
        serverFiltering: true,
        filter: filters
    });
    
    $("#grid").kendoGrid({
        dataSource: dataSource,
        columns: [
            "foo", 
            "bar",
            "fo1"
        ],
        filterable: true
    });
}