List webhooks

curl --request POST \
  --url https://api.etherfuse.com/ramp/webhooks \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '{
  "pageSize": 10,
  "pageNumber": 0
}'

{
  "items": [],
  "totalItems": 0,
  "pageSize": 10,
  "pageNumber": 0,
  "totalPages": 0
}