summon falling block. ProtocolLib

Help me please summon a falling block. He needs to set the material, but I don't know how. Looks on many forums, but found nothing.

code (open) code (close)

Code:

PacketContainer packet = new PacketContainer(PacketType.Play.Server.SPAWN_ENTITY);

packet.getIntegers().write(0, 22);
packet.getUUIDs().write(0, UUID.randomUUID());
packet.getEntityTypeModifier().write(0, EntityType.FALLING_BLOCK);

packet.getDoubles()
.write(0, fallingLoc.getX())
.write(1, fallingLoc.getY())
.write(2, fallingLoc.getZ());