{
  "manageEntity": {
    "action": "Save",
    "entityId": "592528533",
    "entityType": "Track",
    "nonce": "0x0e63b23526455cce16db93cb5268b0bb30d24b938f3e3f76e432ae4e1ce19c86",
    "signature": "0xa954449a1bc5e74d5d2fa712e22ebd76d5876d5303f57274c2f1bcce4d9ddb7b080e7228bb0f48760048f05030c7fb68f3e7567779b7e618bda6c26ae8f9cdab1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}