{
  "manageEntity": {
    "action": "Save",
    "entityId": "717590934",
    "entityType": "Track",
    "nonce": "0x6385ebabedce5ae2c352ab2e25f968345b91b904444041f6b1941b1adafb4bfe",
    "signature": "0xbb803db7d8be429f2b4f8567d5ffb33690833f2e333684aaccda41bc78e262a54295229bd8af09b70066f9a26c2167e785be500006bdc9d51f4c01f5796a73a11b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}