Chatfuel Card

[
    {
      "attachment": {
        "type": "template",
        "payload": {
          "template_type": "button",
          "text": "Hello!",
          "buttons": [
            {
              "type": "show_block",
              "block_name": "some block name",
              "title": "Show the block!"
            },
            {
              "type": "web_url",
              "url": "https://github.com/louwng/images/blob/master/ZU-BJY.jpg?raw=true",
              "title": "Buy Item"
            }
          ]
        }
      }
    }
  ]
}