{
  "manageEntity": {
    "action": "Save",
    "entityId": "147543053",
    "entityType": "Track",
    "nonce": "0xf534aedffce2eb0b2c28b8d834b0c09d6cd4b39b7a476739acc94a5bc6212e66",
    "signature": "0x061cd00a28eb3d814d838fe294ded071183dd5dd54392e62054bc329cc6151f75b3616a04b9dea76afa33ed7b5acbbb06a888545a119842b3800a628fe69ed0c1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}