{
  "manageEntity": {
    "action": "Save",
    "entityId": "673191229",
    "entityType": "Track",
    "nonce": "0x6e2fdc2ea43acee17186c8ad4c74c7274c93f6d8c5254b838b43830eaee2550b",
    "signature": "0x0ffdb8fae3f447fe1c829339282311b3feca38dcc7e56e33561ef27e8050ad252e0a53c8bdd67de64c80fdd42cf27b008dc8caf00f1f9b8d5968421070e0311e1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}