{
  "manageEntity": {
    "action": "Save",
    "entityId": "1237685758",
    "entityType": "Track",
    "nonce": "0xf5022a212658d111d72f6a967a89f7268a26f90ec14a601452254ae7dc61cc3b",
    "signature": "0x374d7165dc4311762d30b7d49a70d54ea36e94e6f47f30ced699b8715ef3a501274b22b0b53f15c1d93816ce933f9ebf5ff917c54680004db19f26ddef708b5b1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}