E1 http change settings error

[q3o]

Hi, I've got an E1 and I'm trying to change via http the shoot_mode setting.
If I do a query first it says:
{"code":0,"desc":"string","key":"shoot_mode","type":1,"ro":0,"value":"Program AE","opts":["Program AE","Aperture priority","Shutter priority","Manual mode"]}
So I want to change to Aperture, I've tried
IP/ctrl/set?shoot_mode="Aperture priority"
=A
=a
=Aperture
and any other likewise variant you can think of, even numbers

Anyone can help me figure out which is the correct option for this key's value?
Thanks

[q3o]

Just in case someone has the same problem I did, I found out the anwser.
The correct sintax would be
IP/ctrl/set?shoot_mode=Aperture%20priority
I thought I had tried that but I must have skipped that obvious option