Need help syncing sounds

After deciding to use decorators for sycing sounds on entities. how would a client track a sound id of all the vehicles? So i send a event from client A that says the sirensstateupdate and it also sends the vehicles netid. when client B recives that message that got relayed through the server it will play that sound on the entity that is in its game based on decorators attached to the vehicle. Now if client A send a message to stop the sound with the netid of the vehicle, how will client B know how to stop a sound if it does not have its soundids.