{
  "manageEntity": {
    "action": "Save",
    "entityId": "1643361749",
    "entityType": "Track",
    "nonce": "0x38452e560a1ceb75ec43a1f823675358c69f39b2755dddeda61b7b6d09588656",
    "signature": "0x5628a8e8e2b6ffae1ea09fbc6fa9383550f8e5c68922252d9efb62fb22f1597b621e59ede6249ac4b5f7bf50e28a4697327a2d324e2e37066309af809d25e23e1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}