#!/bin/bash
s="user|396012_232|program|30720Mn|
|396012_232.batch|batch|30720Mn|5108656K
user|398498_2|program|102400Mn|
|398498_2.batch|batch|102400Mn|36426336K
user|391983_233|program|30720Mn|
|391983_233.batch|batch|30720Mn|5050424K"
sed 'N;s/\x0A.*|\([^|]*\)$/\1/' <<< "$s"
IyEvYmluL2Jhc2gKcz0idXNlcnwzOTYwMTJfMjMyfHByb2dyYW18MzA3MjBNbnwKfDM5NjAxMl8yMzIuYmF0Y2h8YmF0Y2h8MzA3MjBNbnw1MTA4NjU2Swp1c2VyfDM5ODQ5OF8yfHByb2dyYW18MTAyNDAwTW58CnwzOTg0OThfMi5iYXRjaHxiYXRjaHwxMDI0MDBNbnwzNjQyNjMzNksKdXNlcnwzOTE5ODNfMjMzfHByb2dyYW18MzA3MjBNbnwKfDM5MTk4M18yMzMuYmF0Y2h8YmF0Y2h8MzA3MjBNbnw1MDUwNDI0SyIKc2VkICdOO3MvXHgwQS4qfFwoW158XSpcKSQvXDEvJyA8PDwgIiRzIg==