{
  "max": {
    "overall": "2019-05-30",
    "by_type": {
      "2": "2018-03-23",
      "3": "2019-05-30"
    }
  },
  "min": {
    "overall": "2018-03-23",
    "by_type": {
      "2": "2018-03-23",
      "3": "2019-05-30"
    }
  }
}