{
  "manageEntity": {
    "action": "Save",
    "entityId": "98421",
    "entityType": "Track",
    "nonce": "0xdd05a5616c0b189bdfc85c250691b5e44317d94b0fdd51712fa751bfb87d90f6",
    "signature": "0xee8407eba063527ce9c9daff05d5968757c546f6823b9d4cf70fbee77c6196634414b21467075eb6bd5f03ad9d698a5c76c2e3c7e2a6e43af2c2bff946b0688f1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}