code.rb

require 'json'
file = File.read('./event.json')
event = JSON.parse(file)
keys = event['windows']['perfmon']['metrics']
keys.each{|key,value|
	hash = {}
	if ( key =~ /_/ )
		key.split('_').reduce(hash) { |h,m| h[m] = {} }
		puts hash.to_json
	end
}


		#event['windows']['perfmon']['metrics'].store(hash.to_json, event['windows']['perfmon']['metrics'].delete(key))