curl --request POST \ --url https://{workspace}.spreesuite.com/billspree/billing-groups \ --header 'Authorization: <api-key>' \ --header 'Content-Type: application/json' \ --data ' { "name": "North Region", "billingPeriodID": null, "method": "Create", "action": "Add Billing Group", "apiVersion": "v2" } '

{ "success": true, "statusCode": 200, "message": "Request Succeeded.", "error": null, "data": {} }