This method is used to rename the subscription, add it to a folder, remove it from folder or unsubscribe from it. You can also subscribe and directly rename it and add it to folder via this method.
ac- Action. Can be
s- Stream ID, e.g.
t- Subscription title. Omit this parameter to keep the title unchanged
a- Add subscription to folder. Use full folder name like
r- Remove subscription from folder. Use full folder name like