jQuery Grid Plugin - jqGrid

Hello,

I'm trying to make a PHP lib for jqgrid, but when i generate the JSON, it doesnt work. I think its the json format, but iam not sure. Here's an example:

{"page":1,"total":1,"records":"4","rows":[{"id":"43","cell":["43","Ygor"]},{"id":"44","cell":["44","Rui"]},{"id":"45","cell":["45","Ricardo"]},{"id":"46","cell":["46","Doutor"]}]}

Is it json format or do i have to start looking elsewhere?

Thanks!