json - Make changes to json string using jsonnet

Question

I want to change namespace in alok-pod.json in the below json using jsonnet.

{
    "apiVersion": "v1",
    "items": [
        {
            "apiVersion": "v1",
            "data": {
                "alok-pod.json": "{\n  \"namespace\": \"alok\",\n  \"editable\": true,\n}"
            }
        },
    ]
}

Please suggest how this can be done using jsonnet?