{
  "manageEntity": {
    "action": "Save",
    "entityId": "678196796",
    "entityType": "Track",
    "nonce": "0x7f2eda5ad10a1ec1796c01f37b0b9ee3394760f6afc3028975024b76e5722c90",
    "signature": "0x194aaee72bdca17dd9ad15c9173002f4d15e50327ee408f663d49b381adebaa835b8a10029731deed6ff55c3c28074a5a90ef4ba049c319fb6f61dc3d53e26521c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}