Never cheat on a dev!!
This is navigation API for Iran's transportation organization.

"unique_id : *Arabic characters*"

ABSOLUTELY BARBARIC

@Jop- because unique ids usually are integers or simple Latin words. But these are Arabic characters which are not standard and appears to me really not easily findable (like it would be easy by using a random integer to find existing unique id integers).
I'm not saying Arabic language is barbaric if you got offended or implied this :p

I agree with @Strannch unique stuff must be either integers or simple Latin words, imagine querying for Arabic primary key, I mostly use GUID for primary keys. I sometimes face hell when querying Arabic data on SQL server 😪