{
  "manageEntity": {
    "action": "Save",
    "entityId": "673105",
    "entityType": "Track",
    "nonce": "0x927ec93ec8cac5280c8ed81e70ef2a0178dd82857bb18048b231f47343ee049b",
    "signature": "0xb4695037f4b9a86be9dfa17521d0631d0d343004ebc0ed9c3f867c50ed229cfd06c4284e1097f65f7fe3099ed944d4d981f5c470c54d1e9a738270c3ad948d921b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}