App Panel not showing Header

App Development
1

I have an App Panel set up in my sandbox which fetches data from an API, e.g.

{
    "data": {
        "id": 35,
        "header": "Das Avengers",
        "system_start": "2017-09-02T00:00:00.000+01:00",
... 
    }
}

However the header value does not show up in my app panel as it does not seem to be forwarded to the front end by your systems:

{
    "success": true,
    "data": {
        "data": {
            "row": {
                "id": {
                    "type": "double",
                    "options": {
                        "label": "Id",
                        "value": 35,
                        "visibleOn": "always",
                        "order": 0
                    }
                },
                "system_start": {
                    "type": "date-time",
                    "options": {
                        "label": "System Start",
                        "value": "2017-09-02T00:00:00.000+01:00",
                        "visibleOn": "always",
                        "order": 2
                    }
                },

All other fields seem to be showing and my schema includes it
image