1. A method for exchanging an application command, the method comprising the steps of: i) receiving at a presence server a subscription message from a watcher requesting presence information relative to an application, the subscription message comprising an identifier of the application; ii) receiving at the presence server from a presence entity a presence tuple comprising the application identifier and an application command to be executed by an application identified by the application identifier; iii) detecting an active subscription of the watcher for presence information relative to the application; and iv) sending to the watcher the tuple comprising i) the identifier of the application and ii) the application command to be executed by the watcher.