Firebase doesn't return JSON value

Why the Firebase GetValue block doesn’t return a proper JSON Object? I’ve tested the returned value with several JSON extensions but to no avail. Am I doing something wrong? Is there any option to work around this?

Thanks in advance for any answer

After a well rested night of thought I came to this:
I was inputing the child/subchild format directly into the Firebase tree (if you export its JSON it looks fine).
I named a bucket, inserted a tag, then inserted a child/value for each info I neded.

But for my needs, I resorted to creating a form (to send correct values) to set the value of my tag as the full JSON i nedded.

It solves, for now. But if anyone else has any input on this I’d appreciate.