watcher/etc/param_watcher.cfg

{
    "services" : [{
            "name" : "param_watcher",
            "path" : ["/system/bin/sa_main", "/system/profile/param_watcher.xml"],
            "uid" : "system",
            "start-mode" : "boot",
            "gid" : ["system", "shell"]
        }
    ]
}