post https://api-sandbox.bill.com/api/v2/GetObjectUrl.json
Retrieve the unique web app URL for a BILL object. The sandbox URL format is https://app-sandbox.bill.com/{object}?id={object_id}.
This URL is useful for redirecting users from your application to complete operations with the BILL web app. For example, https://app-sandbox.bill.com/bill?id={bill_id} redirects currently signed in users to the specified vendor bill.