Remove Authorization document case-by-case

Sometimes (not always, depends on situation) we want to remove the default Authorization document. I would like to know how to do it with REST API using JSON and http calls to the server. In VB.NET we do this as follows: referenceToPackage = eslClient.GetPackage(packageId) Dim loAuthForm As Document = referenceToPackage.Documents(0) eslClient.PackageService.DeleteDocument(packageId, loAuthForm) In VB, we do this before adding our own document for signing. With REST API, we are uploading our document upfront with the signature data in the multipart/form-data post body, so i want to make sure the document I remove is the authorization document, not our document. How would I go about forming the JSON to upload and remove the default authorization document? Thank you! -Joe