Test

require 'json'
require 'net/http'

url = URI.parse('http://lpdemo.thirdpillar.com/loanpath-piedmont-web/rest/get/request/16230.json')
req = Net::HTTP::Get.new(url.path)
res = Net::HTTP.start(url.host, url.port) {|http|http.request(req)}
parsed_json = JSON.parse res.body

document_type_details = []
parsed_json["sr.getEntityResponse"]["list"].each do |list|

  list["request"]["documentGroup"]["uploadedDocuments"].each do |ud|
    ud["document"].each do |d|
      type_detail = d["documentType"]["documentTypeDetail"]
      document_type_details << type_detail["value"] unless type_detail.nil?
    end
  end
end

puts document_type_details