List webhook subscriptions

Example response

{
  "subscriptions": [
    {
      "id": "whsub_a1b2c3d4e5f6",
      "name": "Production Webhook",
      "url": "https://api.example.com/webhooks/notifuse",
      "secret": "whsec_a1b2c3d4e5f6g7h8i9j0",
      "settings": {
        "event_types": [
          "contact.created",
          "contact.updated",
          "email.sent"
        ],
        "custom_event_filters": {
          "goal_types": [
            "purchase",
            "subscription"
          ],
          "event_names": [
            "orders/fulfilled",
            "payment.succeeded"
          ]
        }
      },
      "event_types": [
        "contact.created",
        "contact.updated",
        "email.sent"
      ],
      "custom_event_filters": {
        "goal_types": [
          "purchase",
          "subscription"
        ],
        "event_names": [
          "orders/fulfilled",
          "payment.succeeded"
        ]
      },
      "enabled": true,
      "last_delivery_at": "2024-01-15T10:30:00Z",
      "created_at": "2024-01-01T00:00:00Z",
      "updated_at": "2024-01-15T10:30:00Z"
    }
  ]
}