Data::URIEncode allows for encoding and decoding complex (multi level
datastructures) using native Query String manipulators (such as CGI.pm).
It takes complex data and turns it into a flat hashref which can then be turned
into a URI query string using URL encoding. It also takes a flat hashref of
data passed in and translates it back to a complex structure.

WWW: https://metacpan.org/pod/Data::URIEncode