Push JSON File to Firebase - json

Question

I've got a large JSON file that I'd like to push to my Firebase. It's currently in a specific format that I'd like to slightly change when pushed.
My current JSON file looks a bit like this:
"item": [
{
"title": "Hernia Repair",
"dc:creator": "realph",
"content:encoded": "A hernia occurs when an internal part of the body pushes through a weakness in the muscle or surrounding tissue wall. Your muscles are usually strong and tight enough to keep your intestines and organs in place, but a hernia can develop if there are any weak spots.",
},
...
]
While my Firebase items look like this:
"services" : {
"-JfTLQsxlZr6W2JWwMMd" : {
"description" : "Hernia repair refers to a surgical operation for the correction of a hernia (a bulging of internal organs or tissues through the wall that contains itself.",
"title" : "Hernia Repair",
},
...
}
I'm trying to push each one of these items to the services object that's already set up in my Firebase. But I'd like to push each item to a new unique id (i.e. -JfTLQsxlZr6W2JWwMMd), just like it is in my Firebase object (above). I also want push the title to title and push content:encoded to description.
Is this even possible? Doing this would potentially save me a lot of time going forward.
Any help from someone that is familiar with this sort of thing would be appreciated. Thanks in advance!
Update
This is what I was thinking to do, but I don't believe it's wired up correctly. I'm getting back a unique key with the console.log, but no item is being added to the services object:
$scope.convertItems = function() {
for(var i=0; i < $scope.items.length; i++) {
var newService = {
title: title,
description: 'content:encoded'
};
}
var promise = ServiceService.add(newService);
promise.then(function(data) {
console.log(data.name());
});
};