Cannot see json in my datatable

Hello everyone,
I create a json object ,

{"devices":[{"name":"D9123","id":"32","isOn":"true","automation":{"suspended":"true","expiration":"15 January 20:00pm 2020"}},{"name":"D9043","id":"45","isOn":"true","automation":{"suspended":"false"}},{"name":"D4120","id":"29","isOn":"false","automation":{"suspended":"false"}}]}

and i am working on ajax i want to create a datable which has this elements but i cannot see objects in it.
This is my table:

@section scripts
{

<script>
    $(document).ready(function () {


        $('#table').DataTable(
            {

                "ajax": {
                "url": 'myurl',
                "type": 'GET',
                "datatype": 'json',
                "dataSrc" : "data"
                },
                columns: [

                    { "devices": 'name' },
                    { "devices": 'isOn' },
                    { "devices": 'automation.suspended' }

                ]


            });


    });


</script>

}

what is the problem please help me