curl --request GET \
  --url https://panel.sendcloud.sc/api/v3/event-subscriptions/subscriptions \
  --header 'Authorization: Basic <encoded-value>'

{
  "data": [
    {
      "id": 1,
      "connection_id": 1,
      "event_type": "parcels.event.created",
      "is_active": true,
      "created_at": "2026-01-15T11:00:00Z",
      "updated_at": "2026-01-15T11:00:00Z"
    },
    {
      "id": 2,
      "connection_id": 2,
      "event_type": "parcels.event.created",
      "is_active": false,
      "created_at": "2026-01-16T09:15:00Z",
      "updated_at": "2026-01-16T09:15:00Z"
    }
  ]
}