curl --request GET \
  --url https://api.wavix.com/v1/buy/countries \
  --header 'Authorization: Bearer <token>'

{
  "countries": [
    {
      "id": 8669,
      "has_provinces_or_states": false,
      "name": "Argentina"
    },
    {
      "id": 8650,
      "has_provinces_or_states": true,
      "name": "Australia"
    }
  ]
}