Adding a command.

Client

// In javascript
var params = {
	"ViewName" : "MyView",
	"Interacting" : true
};
pureweb.getClient().queueCommand('SetInteracting', params, function (sender, args) {
});

Service

// In your C++ service register a command and the callback :
StateManager::Instance()->CommandManager().AddUiHandler("SetInteracting", Bind(this, &MyService::OnSetInteraction));

void MyService::OnSetInteraction(CSI::Guid sessionId, CSI::Typeless command, CSI::Typeless& response)
{
    bool interacting = command["Interacting"].Value().As<bool>();
    String viewName = command["ViewName"].Value().As<String>();
    StateManager::Instance()->ViewManager().SetViewInteracting(viewName, interacting);
}