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

{
  "webhooks": [
    {
      "id": "<string>",
      "url": "<string>",
      "event_types": [
        {
          "name": "<string>",
          "description": "<string>",
          "status": "<string>",
          "resource_versions": [
            "<string>"
          ]
        }
      ],
      "links": [
        {
          "href": "<string>",
          "rel": "<string>",
          "method": "GET"
        }
      ]
    }
  ]
}