URL кодирует пару незначения в Python

Пока ваш json является текстом / строкой, вы можете использовать json.loads() для чтения этого в:

import json

JS_TEXT = '''{
"@context": "http://schema.org",
"@type": "Article",
"headline": "Fact of the Day: 51 Facts Of the Day for 3/19/2019 ←FACTSlides→",
"image": "https://www.FACTSlides.com/imgs/ishots/8224.png",
"author": "Luke Reiner",
"genre": "facts",
"publisher": {
    "@type": "Organization",
    "name": "FACTSlides",
    "logo": {
        "@type": "ImageObject",
        "url": "https:\/\/www.factslides.com\/imgs\/logo.png"
    }
},
"url": "https://www.factslides.com/s-Fact-Of-The-Day",
"mainEntityOfPage": "https://www.factslides.com/s-Fact-Of-The-Day",
"datePublished": "2019-03-19",
"dateCreated": "2019-03-19",
"dateModified": "2019-03-19",
"description": "Description.",
"articleBody": "Article clutter here."
}'''


jsonObj = json.loads(JS_TEXT)