Sorry Skylinerw, I don't know how to reply with JIRA
Here,
setblock -576 55 1154 wall_sign 4 replace {Text2:"{\"text\":\"\",\"clickEvent\":{\"action\":\"run_command\",\"value\":\"setblock -564 54 1149 redstone_block\"}}"}
Except, maybe it wasn't intentionally set to 0...
Oh