{
  "manageEntity": {
    "action": "Save",
    "entityId": "1429302907",
    "entityType": "Track",
    "nonce": "0x31804ef4a666c61aa30dd4ad7569ca081ecef9e0ea17d4ea25a75f0239ac7651",
    "signature": "0x919fe3e62aeab3df5fd06df273e7044d9572fa8661d7ff8247947d2a15c908692ef305743dda353a4dfc1e0c5402ceb7731c02cefeaf47bc4f67b8f098acaec51c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}