curl --request POST \
  --url https://apiv1.cakeip.com/openapi/ip/getRegionList \
  --header 'Content-Type: application/json' \
  --data '
{
  "appKey": "<string>",
  "params": {
    "countryId": "<string>"
  }
}
'

{
  "code": 0,
  "msg": "<string>",
  "data": [
    {
      "name": "<string>",
      "code": "<string>"
    }
  ]
}