Getting schematic data

Hello, I'm trying to get data from a schematic. Specifically, I'm trying to get the TileEntities list.

This is what I'm doing:
I'm getting the child tag TileEntities from the schematic

Code:

List<Tag> tileEntities = getChildTag(schematic, "TileEntities", ListTag.class).getValue();

And when pasting the schematic, I get the same list

Code:

List<Tag> tileEntities = schematic.getTileEntities();

The problem that I have is:
When I get the data and I print it in the console:

Code:

        for(Tag tag : tileEntities) {
            System.out.println(tag.getValue());
        }

I get this:

Code:

{x=TAG_Int("x"): 1, Text4=TAG_String("Text4"): "", y=TAG_Int("y"): 0, Text3=TAG_String("Text3"): "", z=TAG_Int("z"): 1, Text2=TAG_String("Text2"): "", id=TAG_String("id"): Sign, Text1=TAG_String("Text1"): ""}

In my case, the schematic only has a sign (for testing purposes).

How can I use those values to put them on (in this case) the sign(s)?
Thanks!