JSON KENDO DataSource External search filter not working

I'm using external search filter for kendo grid..

My code data source read function it will return json data

dataSource = new kendo.data.DataSource({
                type        : 'json',
                transport   : {
                    read:  {
                        url: apiurl+"/customer/getCustomers",
                        dataType: "json",
                        type:"POST",
                        data:{'userID':userID}
                    }                   
                },
});

My search function

var customerID   = $("#customerID").val();

grid.dataSource.query({
                page:1,
                pageSize:10,
                filter:{
                    logic:"and",
                    filters:[
                        {field:"uniqueID", operator:"contains",value:customerID},

                    ]
                }
            });

The above code i have used for filter query

These below json response only i will receive

{"status":true,"code":1,"message":"Success","api":"getCustomers","result":{"customer":[{"customerID"
:11},.....]} 

But the filter query not filter as per the condition..the filter always return all response data..not filters data ..ie if i search 5 in customer id field ..it returns everything

It's only occuring for json data response