{
  "manageEntity": {
    "action": "Save",
    "entityId": "508903298",
    "entityType": "Track",
    "nonce": "0x17fed19c545204f0ad5a9d0b8d5c1c562e7d0ef1bc6c96b88e8239830a9e242c",
    "signature": "0x47d534b032aa026c6c947871fff2ba4a609cda853248fbebc989e611cdbb49115268471a020fbd55e63c992af1c7cd8bc8647a7cf918a43d0f24ec757d12c5391c",
    "signer": "0x3324C23609BC25902C39CFa38CF40581c7Bc7F87",
    "userId": "229134011"
  }
}