The Paykka Cross-border Payment Open Platform will send callback notification requests to the client's provided HTTPS endpoint when the status of a resource created by the client changes (e.g., merchant onboarding approved)
Callback notifications use the same signature/verification method as client-initiated requests
Notification endpoints are marked with a "Notification" identifier in the API list; ignore the "Request Path" part in the API description. The specific notification type is distinguished by the biz_type field in the request body
