{
  "manageEntity": {
    "action": "Save",
    "entityId": "135460",
    "entityType": "Track",
    "nonce": "0x7cfad0701e9c6861061212758ab004eb3b218e67a769c7e066d4e9c481e77c81",
    "signature": "0xb4f68105a9edff57eeff2b6645b44524032b7b46ff71cc441f099bf6fdd7e6d643c7a7a274f69587db0a1f219e0b616c7094ef03616bcc14a18221bcd6d340be1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}