respective book and chapter structure added.

[bookstack] / dev / api / requests / books-create.json

{
  "name": "My own book",
  "description_html": "<p>This is <strong>my</strong> own little book created via the API</p>",
  "default_template_id": 2427,
  "tags": [
    {"name": "Category", "value": "Top Content"},
    {"name": "Rating", "value": "Highest"}
  ]
}