Entity_ArmorStand: {
    type: "compound";
    value: {
        Pose: {
            type: "compound";
            value: {
                LastSignal: { type: "int"; value: number };
                PoseIndex: { type: "int"; value: number };
            };
        };
    };
} & ActorPrefix

Additional fields for [armor stand](https://minecraft.wiki/w/armor stand).