curl -X POST \
  http://localhost:8080/alfresco/api/-default-/public/cmis/versions/1.1/browser \
  -H 'authorization: Basic YWRtaW46a2VlbnNvZnQ=' \
  -H 'content-type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW' \
  -F cmisaction=query \
  -F 'statement=select alfcmis:nodeRef, cmis:name from sign:firmable'