curl --request PUT \
  --url https://api.lygosapp.com/v1/gateway/{gateway_id} \
  --header 'Content-Type: application/json' \
  --header 'api-key: <api-key>' \
  --data '
{
  "amount": 123,
  "shop_name": "<string>",
  "message": "<string>",
  "success_url": "<string>",
  "failure_url": "<string>"
}
'