{
  "manageEntity": {
    "action": "Save",
    "entityId": "579229",
    "entityType": "Track",
    "nonce": "0x990cd95ad987f09b34b314c3ebeee4a755d1321308f0cfb33eac158e0af08426",
    "signature": "0x1e8d9d9cd7138c679373458ccf9c10f0f51c53c223d8b4898620af7c3a231a1714a1afc3b043a50dc56e440f4e331a1b1620b12cf1ab39541bb2f1bf6ad5e31d1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}