json_txt = """{
    "entries": [
        {
            "extensions": {
                "telephone": "123123", 
                "url": "www.blablablah", 
                "name": "name", 
                "coordinates": "coords", 
                "address": "address"
            }, 
            "summary": "here is the summary"
        }
    ]
}"""
Parsing JSON with python: blank fields