curl --request GET \
  --url https://api.wavix.com/v1/buy/countries/{country}/regions/{region}/cities

{
  "cities": [
    {
      "area_code": 113,
      "id": 128791,
      "name": "Buenos Aires"
    },
    {
      "area_code": 341,
      "id": 132655,
      "name": "Rosario"
    },
    {
      "area_code": 351,
      "id": 132656,
      "name": "Cordoba"
    },
    {
      "area_code": 381,
      "id": 141803,
      "name": "Tucuman"
    },
    {
      "area_code": 387,
      "id": 141986,
      "name": "Salta"
    }
  ]
}