Get a subscription

curl -H "Authorization: Bearer YOUR_TOKEN" \
     https://your-app.com/exo-api/webhooks/1

{
  "id": 1,
  "user_id": 1,
  "url": "https://example.com/webhook-receiver",
  "resource": "order",
  "events": ["on_create", "on_update"],
  "is_active": true,
  "masked_secret": "sec_****a1b2",
  "created_at": "2026-03-28T14:30:00.000000Z",
  "updated_at": "2026-03-28T14:30:00.000000Z"
}