{
  "manageEntity": {
    "action": "Save",
    "entityId": "636041026",
    "entityType": "Track",
    "nonce": "0xe9633197554d7c0ccb3b912def0e2fc42aa8797faa391c1c300fb39ebb1053f4",
    "signature": "0x748f763324d0d7bdea16734479713c5e972faac822d284719a6767cd183e7c032b620c737e12891bcf87e1f46d7a1f89496c60a96ecf2f5ebab27791730cb4411b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}