/setblock sign text

This code works in 15w31c, but not 15w32b.

/setblock ~ ~1 ~ minecraft:standing_sign 0 replace {Text1:"{text:\"\"}",Text2:"{text:\"\"}",Text3:"{text:\"\"}",Text4:"{text:\"\"}"}

Sign:
{text:""}
{text:""}
{text:""}
{text:""}