A Cooltown user squirts the URL of a sound file or a streaming radio station to an Internet radio. Suggest a modification to the eSquirt protocol that would enable the user to control the volume from...

A Cooltown user squirts the URL of a sound file or a streaming radio station to an Internet radio. Suggest a modification to the eSquirt protocol that would enable the user to control the volume from their portable device. Hint: consider what extra data the squirting device should provide.