The Lesson object

{
  "id": "lsn_01HX9N5AB3...",
  "object": "lesson",
  "cohort_id": "coh_01HX9...",
  "unit_id": "uni_01HX9...",
  "name": "The postulates of special relativity",
  "type": "reading",
  "position": 2,
  "enabled": true,
  "approved_at": "2026-05-10T13:00:00Z",
  "evaluable": true,
  "optional": false,
  "url": "https://app.hawkings.education/lessons/lsn_01HX9N5AB3",
  "metadata": {},
  "content": null,
  "activities": [],
  "assignment": null
}