ListNotificationSubscriptionsResponse

{
    "items": {
        "items": [
            {
                "subscription_id": "20251022-0949-42c7-947d-67f32a1ecf45",
                "channel": "callback",
                "notification_types": [
                    "transaction_approved",
                    "transaction_rejected"
                ],
                "targets": [
                    "https://example.com/callback-endpoint",
                    "https://another-endpoint.com/callback"
                ],
                "created_on": "2024-08-06T20:15:30Z"
            },
            {
                "subscription_id": "20251022-0949-42c7-947d-67f32a1ecf46",
                "channel": "email",
                "notification_types": [
                    "transaction_approved",
                    "transaction_rejected"
                ],
                "targets": [
                    "user@example.com",
                    "admin@example.com"
                ],
                "created_on": "2024-08-06T20:20:30Z"
            }
        ]
    }
}