{
  "manageEntity": {
    "action": "Save",
    "entityId": "2134985456",
    "entityType": "Track",
    "nonce": "0xfa6269ef2b2e024516b427b08129c33976d2a2150182922ad7eec903b0e94144",
    "signature": "0xe206961219af8c1b7c8ede7cbde590a87500d836754c19c8bc9a30db714070ca40d671de391db1e5184082de34f0408078f0451b2b6adbad9c29efb78bba4b851b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}