db.json

{
  "comments": [
    {
      "id": "1",
      "body": "First comment",
      "username": "Jack",
      "userId": "1",
      "parentId": null,
      "createdAt": "2021-08-16T23:00:33.010+02:00"
    },
    {
      "id": "2",
      "body": "Second comment",
      "username": "John",
      "userId": "2",
      "parentId": null,
      "createdAt": "2021-08-16T23:00:33.010+02:00"
    },
    {
      "id": "3",
      "body": "First comment first child",
      "username": "John",
      "userId": "2",
      "parentId": "1",
      "createdAt": "2021-08-16T23:00:33.010+02:00"
    },
    {
      "id": "4",
      "body": "Second comment second child",
      "username": "John",
      "userId": "2",
      "parentId": "2",
      "createdAt": "2021-08-16T23:00:33.010+02:00"
    },
    {
      "body": "fggg",
      "parentId": null,
      "id": "05Xzmd8"
    },
    {
      "body": "qqqq",
      "parentId": null,
      "id": "qIKJhn8"
    },
    {
      "body": "mark",
      "parentId": null,
      "id": "evA3CpT"
    },
    {
      "body": "dgdf",
      "parentId": null,
      "createdAt": "2022-02-09T16:35:26.310Z",
      "id": "CDGuw_T"
    },
    {
      "body": "qqqq",
      "parentId": "1",
      "id": "V1Wg8w6"
    }
  ]
}