I can't place a sign with commands.

I can't place the wall sign blocks by commands.

What I expected to happen was...:
Get a sign placed on a stone, saying "Good." on the 2nd line.

What actually happened was...:
Sign WAS placed on the stone, but it was blank.

Steps to Reproduce:
1. /setblock <x> <y> <z> wall_sign 0 replace {Text2:"

{text:\"Good.\"}

"}
2. and then press Enter.
3. There is a blank sign placed.