{
  "manageEntity": {
    "action": "Save",
    "entityId": "800720762",
    "entityType": "Track",
    "nonce": "0x29b0647bad0c9e353c78f59ef19de6897cb6a0eedf633094d997c27f462d1a61",
    "signature": "0x5a34f3011d622e8338e9f9fb9bf5d197ef8bf870313d02038408fd3e6fef69d721c92df40e27f8f4a9bfdb492bdd74345c28cde162965022317f82b5ed0b4fa81b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}