{
  "summary": "Merge Multiple PDFs",
  "description": "Combine multiple submissions into a single PDF",
  "request": {
    "submission_ids": [
      "sub_000000000000001",
      "sub_000000000000002"
    ],
    "expires_in": 3600
  },
  "response": {
    "status": "success",
    "combined_submission": {
      "id": "com_000000000000001",
      "state": "pending",
      "expired": false,
      "expires_at": null,
      "download_url": null,
      "permanent_download_url": null,
      "metadata": {},
      "submissions": []
    }
  }
}