/usr/lib/pd/extra/purest_json/purest_json-meta.pd is in pd-purest-json 1.4.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | #N canvas 44 178 200 200 10;
#N canvas 44 51 420 300 META 0;
#X text 10 25 AUTHOR thomas@residuum.org;
#X text 10 41 NAME purest_json;
#X text 10 10 VERSION 1.4.2;
#X restore 10 10 pd META;
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