curl --request GET \
  --url https://api.{tenant}.getomneo.com/api/v3/rates/product-variant-estimate

{
  "data": {
    "name": "<string>",
    "handle": "<string>",
    "rate": "<string>",
    "location": "<string>",
    "code": "<string>",
    "region_id": 123,
    "country_iso_2": "<string>",
    "priority": 123
  }
}