llInstantMessage(CORRADE,
    wasKeyValueEncode(
        [
            // gets the visual parameters of
            // the avatar named Fuzzy Resident
            // Ana Resident and the avatar respresented
            // by UUID 3b3806df-c246-4ff4-81fb-789e623ce7cd
            "command", "batchgetavatarappearancedata",
            "group", wasURLEscape(GROUP),
            "password", wasURLEscape(PASSWORD),
            "avatars", wasListToCSV([
                "Fuzzy Resident",
                "Ana Resident",
                "3b3806df-c246-4ff4-81fb-789e623ce7cd"
            ]),
            "data", "FaceTextures",
            "callback", wasURLEscape(URL)
        ]
    )
);