Q: JSON stored in variable has keys added I'm issuing an AJAX call from my app to send a JSON message.
I pass this variable to the call:
json_msg = {"object":"page", 
            "entry":[
                {"id":"317614815243036",
                  "time":1473615625653, 
                   "messaging":[
                              {"sender":{id":"1142389195826076"},
                               "recipient":{"id":"317614815243036"},        
                               "timestamp":1473615625498, 
                                "message":{
                                            "mid":"mid.1473615625491:99adedcab35dd94768", 
                                            "seq":4741, 
                                            "text":"Hey"
                                           }
                                }]
                }
             ]
          }

But when I do a console.log(json_msg), I get this: 
json_msg = {"object":"page", 
                "entry":[
                    0:{"id":"317614815243036", // A ZERO ADDED HERE
                      "time":1473615625653, 
                       "messaging":[
                                 0: {"sender":{id":"1142389195826076"}, // A ZERO ADDED HERE
                                   "recipient":{"id":"317614815243036"},        
                                   "timestamp":1473615625498, 
                                    "message":{
                                                "mid":"mid.1473615625491:99adedcab35dd94768", 
                                                "seq":4741, 
                                                "text":"Hey"
                                               }
                                    }]
                    }
                 ]
              }

There are two "0" keys that are being added straight after assigning the variable (to test, I commented out the call and just logged the variable).
This is surely a stupid mistake but I can't find the origin

A: The output of console.log isn't JSON.
It shows the indexes of the array elements. This is normal.
