Bug command /summon Pig ~ ~ ~ {UUID:"0-0-0-0-1"}

Hi !
I'm here to report a bug for minecraft 1.9.2.
I want to create a map with custom mob, so, i need custom UUID for my mob.
In Minecraft 1.8.9, if i type this command : /summon Pig ~ ~ ~

{UUID:"0-0-0-0-1"}

, my Pig have the good UUID.

But if i do the same thing as Minecraft 1.8.9 in Minecraft 1.9.2, it's not work ...

Can you tell me if i need another syntax for the command or if it's just a bug ?

Thank you in advance !