Need to include and retrieve some more data from JSON datasource

[Andrés]

I need to put on a kendo grid toolbar some variable text (defined at the server), and I guess I can send that text as an addition to the JSON string, but I cannot

1. figure exactly how to code that, 
2. reflect it in the schema and/or model and
3. retrieve the text for use on the toolbar.

So far, I have coded like this:

            schema: {

                data: "data",

                model: {

                    msg: "message",  

                    fields: { ... }

The JSON response is served like so:

{"data":[{"Name":"ABC",...,"Update_date":"06\/03\/2012"}], 
 "message":"This is some variable text to be displayed on the toolbar"}

Thanks for any ideas