{
  "manageEntity": {
    "action": "Save",
    "entityId": "371533",
    "entityType": "Track",
    "nonce": "0xcd9bc78b26d8efe1e36244e5f4007455d803d508e62b85957fe69000c85bb246",
    "signature": "0xcec12fd341533bc12410f939afa7cec36f3c19b2de7006cfb2eb39a95d1631a212d3b008e70172ac6897b93fe3979ef51fe72f5569c6796fcc7cc9da819b75711c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}