curl --request GET \
  --url https://api.topsort.com/public/v1/webhooks/webhooks \
  --header 'Authorization: Bearer <token>'

{
  "hasMore": true,
  "nextPage": "SSBzb2xlbW5seSBzd2VhciB0aGF0IEkgYW0gdXAgdG8gbm8gZ29vZAo=",
  "webhooks": [
    {
      "channel": "campaign:create",
      "id": "<string>",
      "marketplaceId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "secret": "<string>",
      "url": "<string>"
    }
  ]
}