create update delete
{
  "type": "card",
  "x": 2765.0162210794065,
  "y": 429.84819860612595,
  // allowed values between 0.02 to 2000 inclusive
  "scale": 0.5880494035837717,
  "title": "<p>Card</p>",
  "description": "<p>Description</p>",
  // date in "YYYY-MM-DD" format
  "date": "2019-08-24",
  "assignee": {
    "userId": "3074457345803957924"
  },
  "style": {
    // supports short hex code color format
    "backgroundColor": "#0ca789"
  }
}