\ is removed from Json in /setblock in falling sand.

I am trying to make a 1 command generator that allows creation of signs at the front. Unfortunately, when I summon the command block with the setblock in, the json has the \removed and so the command does not work.

Note, it says unknown macro in this website for some reason and so I placed it in pastebin:
http://pastebin.com/QntgSjfy

Original Command:

/summon FallingSand ~ ~1 ~ {Tile:command_block,Block:command_block,TileEntityData:{Command:"execute @p ~ ~ ~ setblock ~-2 ~-1 ~ minecraft:wall_sign 4 replace {Text1:\"{text:\"Hello\",color:gold}\"}"},Time:1}
 

Summoned Command:

execute @p ~ ~ ~ setblock ~-2 ~-1 ~ minecraft:wall_sign 4 replace {Text1:"{text:"Hello",color:gold}"}