libjson-pp-perl 4.16000-1 (amd64 binary) in ubuntu mantic

 JSON::PP is a module for manipulating data stored in the JavaScript Object
 Notation (JSON) serialization format (defined in RFC 4627), which serves as
 an alternative to XML.
 .
 This Pure Perl JSON implementation is also part of perl core, and will be
 loaded by the JSON module (see libjson-perl) if the C/XS-accelerated version
 (see libjson-xs-perl) is not available.