curl --request GET \
  --url https://api.example.com/api/Clients/{clientId}/BillingGroups

[
  {
    "id": 123,
    "clientName": "<string>",
    "primaryContactName": "<string>",
    "countryName": "<string>",
    "createdByUserID": 123,
    "createdByUserName": "<string>",
    "createdDate": "2023-11-07T05:31:56Z",
    "updatedByUserID": 123,
    "updatedByUserName": "<string>",
    "updatedDate": "2023-11-07T05:31:56Z",
    "clientID": 123,
    "name": "<string>",
    "primaryContactID": 123,
    "address1": "<string>",
    "address2": "<string>",
    "address3": "<string>",
    "suburb": "<string>",
    "state": "<string>",
    "postcode": "<string>",
    "country": "<string>",
    "description": "<string>"
  }
]