{
  "manageEntity": {
    "action": "Save",
    "entityId": "954462",
    "entityType": "Track",
    "nonce": "0xf3abcfc29ba98243f41217ccf365196166f3a1bab44c1969d5736b677369644c",
    "signature": "0x69f989563fa88b760541b032e3e0ae755ae3649c61f5d59e582c6eddfc4eec79458223c234eae4954c44c9a6bd59a5f53aa79250a4d69f9c7116318f570ea5f21c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}