{
  "manageEntity": {
    "action": "Save",
    "entityId": "759588134",
    "entityType": "Track",
    "nonce": "1789157366115538834",
    "signature": "0x80059b59b1bb7d9a0de1f961e2937e18444153ceaf3f40128d1147c1c5070d6f6cf9c8f243620859f8ebf7ea5018b9a5e74e94282fc466adb52bba22aa2ad2e11b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}