respective book and chapter structure added.

[bookstack] / dev / api / responses / attachments-update.json

{
  "id": 5,
  "name": "My updated attachment",
  "extension": "",
  "uploaded_to": 4,
  "external": true,
  "order": 2,
  "created_by": 1,
  "updated_by": 1,
  "created_at": "2021-10-20T06:35:46.000000Z",
  "updated_at": "2021-10-20T06:37:11.000000Z"
}