{
  "manageEntity": {
    "action": "Save",
    "entityId": "957684727",
    "entityType": "Track",
    "nonce": "0xe75910381e04f56b216feb6722b41ba102b44362ed58b6925b9bb1a8816e146d",
    "signature": "0x1fb5f7a033ca2eb2e3b86056dd494a10302b5b974eea15fcce8a4c090035f5b53e3d438b9ba153228c4213df43733840ccc5a07d442f7d140ef2095776b9c9191b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}