{
  "manageEntity": {
    "action": "Save",
    "entityId": "274821",
    "entityType": "Track",
    "nonce": "0xa41e2314c0e48f33966d154e10333a6ac7b769db4529fa68afabda776c80e936",
    "signature": "0xa484928a6f7d850a93860a19ed2a7dc133ec16f28851b07e43b0b1b49b8409cd2c3e54b6b65ff83f79d78a3281c6c3d0e2b787f84e00d96a5ccaaa0ea371e1731b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}