Mine

#!/usr/bin/env ruby

require 'rubygems'
require 'json'

lastgen = nil
JSON.parse(STDIN.read).each do |s|
  if s["category"] == "generate" or s["category"] == "immature"
    s.each do |k|
      puts "#{k[0]}: #{k[1]}" unless k[0] == "time"
      puts "#{k[0]}: #{Time.at(k[1]).localtime}" if k[0] == "time"
    end unless s.nil?
  end
end