email;name
test1@Yandex.Ru;Ваня
test2@Yandex.Ru;Ирина
[{"confirmed":true,"email":"test1@yandex.ru","first_name":"\u0412\u0430\u043d\u044f"},{"confirmed":true,"email":"test2@yandex.ru","first_name":"\u0418\u0440\u0438\u043d\u0430"}]
echo -e "test1@Yandex.Ru;Ваня\ntest2@Yandex.Ru;Ирина" | awk -F';' '{print "{\"confirmed\":true,\"email\":\""$1"\",\"first_name\":\""$2"\"},"}' | sed '$ s/.$//' | awk 'BEGIN{print "["} {print} END{print "]"}'