llInstantMessage(CORRADE,
    wasKeyValueEncode(
        [
            // Get the global position and the
            // simulator name from an event
            // with ID 845254.
            "command", "geteventinfodata",
            "group", wasURLEscape(GROUP),
            "password", wasURLEscape(PASSWORD),
            // The event ID to retrieve data for.
            "id", "845254",
            "data", wasListToCSV(
                [
                    "GlobalPos",
                    "SimName"
                ]
            ),
            "callback", wasURLEscape(URL)
        ]
    )
);