Run the following commands on single player, or multiplayer via command block:

/summon ArmorStand ~ ~ ~

{NoBasePlate:1b, CustomName: "Fred"}

/entitydata @e[name=Fred]

{Motion: [0.0,1.0,0.0]}

Now on a spigot server, run the same commands. The result is
"The entity uuid provided is in an invalid format"

After testing, it seems anything with the @e selector does not work via commands, only via command-blocks.