curl --request POST \
  --url http://localhost:8000/api/v1/campaigns/drafts/{draft_id}/rsas/generate-all \
  --header 'Authorization: Bearer <token>'

{
  "rsas": [
    {
      "rsa_ids": [
        123
      ],
      "task_id": "<string>",
      "status": "in_progress"
    }
  ],
  "total_started": 123
}