curl --request POST \
  --url https://sandbox.finhub.cloud/api/v2.1/fincard/virtual/common/v2/city \
  --header 'Content-Type: application/json' \
  --header 'X-Forwarded-From: <x-forwarded-from>' \
  --data '
{
  "regionCode": "AU"
}
'

{
  "success": true,
  "code": 123,
  "msg": "<string>",
  "data": [
    {
      "code": "<string>",
      "name": "<string>",
      "country": "<string>",
      "countryStandardCode": "<string>",
      "parentCode": "<string>",
      "children": [
        {
          "code": "<string>",
          "name": "<string>",
          "country": "<string>"
        }
      ]
    }
  ]
}