curl --request GET \
  --url https://api-m.sandbox.paypal.com/v1/notifications/webhooks/{webhook_id}/event-types \
  --header 'Authorization: Bearer <token>'

{
  "event_types": [
    {
      "name": "<string>",
      "description": "<string>",
      "status": "<string>",
      "resource_versions": [
        "<string>"
      ]
    }
  ]
}