{
  "manageEntity": {
    "action": "Save",
    "entityId": "1833890395",
    "entityType": "Track",
    "nonce": "0xab3609266e091738e421f42d0d34f45d0dda3c1b3fdee59f8cb5fef0a108a32c",
    "signature": "0xf83e098e4ecdc1c74ca580415142daf89d2155500acf43918acf1b71fd1ba835277c0129ad892e8a39e51269b822d4885d8944e71452257d4fef65973d6be96c1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}