{
    "$jason": {
        "head": {
            "title": "button example",
            "description": "app description here"
        },
        "body": {
            "sections": [{
                "items": [
                    {
                        "type": "button",
                        "text": "button text",
                        "style": {
                            "background": "#00ffaa",
                            "color": "#ffffff",
                            "size": "50"
                        }
                    }
                ]
            }]
        }
    }
}