curl --request POST \
  --url https://api.artosai.com/api/v1/templates/{template_id}/sections \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "section_name": "3. Safety Summary",
  "level": 1,
  "order_index": 2
}
'

{
  "message": "<string>",
  "section_id": "<string>",
  "template_id": "<string>",
  "section_name": "<string>",
  "level": 123,
  "order_index": 123
}