Updating sign text not working

[Oba22]

I'm trying to update the text of signs but seem to be missing something.

The following command will report that the sign's data was updated:

/data merge block 3 -59 -3 {Text2:'{text:"SYSTEM STATUS:"}',Text3:'{text:"Busy"}'}

Unfortunately the text on the sign doesn't change, neither does the data of the block (F3+I)

[Nykeriab]

The values of Text1, Text2, Text3 and Text4 are supposed to be JSON. This means that you should use quoted key names.

So this:

{text:"SYSTEM STATUS:"}

Should be changed to this:

{"text":"SYSTEM STATUS:"}