PTO Shaft Code Explanation

{"json":"[{\"photoId\":\"400671144\",\"photoType\":\"pdf\",\"photoSize\":\"29084\",\"name\":\"PTO drive shaft catalogue.pdf\",\"fileId\":\"11986944\",\"encodeFileId\":\"yvApBLenlJZt\",\"photoUrlNormal\":\"//5nrorwxhqopliik.leadongcdn.com/static/assets/widget/images/downloadNew/pdf.svg\"}]","type":"1"}