{
  "manageEntity": {
    "action": "Save",
    "entityId": "865183619",
    "entityType": "Track",
    "nonce": "0x22e2204afc2e1645fdcf785c1a6398efc56c3493570f2690968ca0052cd9b545",
    "signature": "0x573da1ad95e35ecf5a259a014a516aec49a8dc355acb42c566cd12724c483a27440fa8fc89be142f7a2aee8a1ad4656ceb9191420c1814e97d8427ab40e87feb1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}