{
  "manageEntity": {
    "action": "Save",
    "entityId": "948652278",
    "entityType": "Track",
    "nonce": "0xa56fe9834743996c54f86a922cc95a65a0ca89430e4b5e099cd489942a7e44ab",
    "signature": "0xfaef7fcb04d6f9ae2165fe070b0a7c62fbeefc9a69f25df33326ee621f89ea8507ef4128035868a598c6ba1816abdabb3bbbf22fc74ce2db6b4dc2422083200d1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}