{
  "manageEntity": {
    "action": "Save",
    "entityId": "943914825",
    "entityType": "Track",
    "nonce": "0xe1b3d9d0ed4731ee5a1f3bdc1ed2a4bf6113ae2a060fcff6dba0b1a424631df8",
    "signature": "0xa352d56ef99557787cbdda100b2e6ee7734705426b634cbcdfe1b7b9eb84818d4af1c8a72e5f9c7a78f18e6ac9e0d0db91ad7ba1f9d9c7ed27c54bb99055a6321b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}