{
  "manageEntity": {
    "action": "Save",
    "entityId": "1606870236",
    "entityType": "Track",
    "nonce": "0x852697fcd42fa5752c71a0eb5270ea0345e4b7f6f369cacfb63d20e2338463c9",
    "signature": "0xb136da41abfaa9533d2708a19e0d7d807e7056a97b855f5ecfe843d9b03c4f977e9470f3117d11f18e47bf06806b71c314cf03ff4eb5dae8c57d192f1a6178901c",
    "signer": "0xfeBBAF2B7d9F5bE3DAA34bEe70259f61ac4aB836",
    "userId": "139146722"
  }
}