{
  "manageEntity": {
    "action": "Save",
    "entityId": "822096282",
    "entityType": "Track",
    "nonce": "1786464273313149869",
    "signature": "0xf46940d1254d8a06b331d57f314bb8104d6cf9d3715fddacf292230597a31b550dc7b2d2639df8f48b3cf24755f6bd7e96f2f9726c0609fc89610968822b444c1c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}