def _modify_tag(self, name, description, servers, new_name):
body = {'<STR_LIT>': Tag(new_name, description, servers).to_dict()}<EOL>res = self.request('<STR_LIT>', '<STR_LIT>' + name, body)<EOL>return res['<STR_LIT>']<EOL>
PUT /tag/name. Returns a dict that can be used to create a Tag object.

Private method used by the Tag class and TagManager.modify_tag.