Entities instead of UTF-8 in footer json

If you take a look at the footer code, you will see this (instead of proper UTF-8 characters)

This topic is similar to: https://www.ads-software.com/support/topic/html-entities-creater-in-social-description-content/

But in this case it is a different type of encoding.

{"@type":"Organization","name":"\u03a0\u03bf\u03b9\u03ae\u03bc\u03b1\u03c4\u03b1","logo":{"@type":"ImageObject","url":"https:\/\/poiimata.com\/wp-content\/uploads\/2018\/07\/logo-poiimata.png","height":"60","width":"600"}},"headline":"\u039f \u03c7\u03c1\u03cc\u03bd\u03bf\u03c2 \u03ba\u03b1\u03b9 \u03bf \u03b8\u03ac\u03bd\u03b1\u03c4\u03bf\u03c2 (\u03a0\u03ad\u03c4\u03c1\u03bf\u03c2 \u0393\u03ba\u03bf\u03bb\u03af\u03c4\u03c3\u03b7\u03c2)","author":{"@type":"Person","name":"\u03a3\u03c0\u03cd\u03c1\u03bf\u03c2","image":"https:\/\/secure.gravatar.com\/avatar\/f3ae2c20c03cf33cfd002497d511274a?s=50&d=mm&r=g"},"datePublished":"2019-03-21T18:24:50+03:00","dateModified":"2019-03-21T18:25:37+03:00","image":{"@type":"ImageObject","url":"https:\/\/i0.wp.com\/poiimata.com\/wp-content\/uploads\/2019\/03\/bill-3999325_640.jpg?fit=640%2C426&ssl=1&resize=1280%2C720","width":1280,"height":720},"description":"\u039c\u03b9\u03ba\u03c1\u03ac \u03c0\u03b1\u03b9\u03b4\u03b9\u03ac \u03bf \u03c7\u03c1\u03cc\u03bd\u03bf\u03c2 \u03ba\u03b1\u03b9 \u03bf \u03b8\u03ac\u03bd\u03b1\u03c4\u03bf\u03c2 \u03b3\u03b4\u03cd\u03bd\u03bf\u03c5\u03bd \u03c0\u03c1\u03ac\u03b3\u03bc\u03b1\u03c4\u03b1, \u03be\u03b7\u03bb\u03ce\u03bd\u03bf\u03c5\u03bd \u03bd\u03ae\u03bc\u03b1\u03c4\u03b1 \u03b1\u03c0\u03cc\u03bc\u03b5\u03c1\u03b1 \u03c4\u03b1 \u03c0\u03bb\u03ad\u03bd\u03bf\u03c5\u03bd \u03c3\u03c4\u03b7…"}

The page I need help with: [log in to see the link]