curl --request POST \
  --url https://api.example.com/api/dashboard/tax-rates \
  --header 'Content-Type: application/json' \
  --data '
{
  "region_code": "<string>",
  "rate": 0.5,
  "is_default": false
}
'

{
  "region_code": "<string>",
  "rate": "<string>",
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "is_default": false
}