//create new contact record from string
$scope.newContact = new ParseObject('Contact', ['firstName','lastName','email']);
/* OR */
//create new contact record from parse object instance
var Contact = Parse.Object.extend('Contact');
$scope.newContact = new ParseObject(new Contact(), ['firstName','lastName','email']);

<input type="text" ng-model="newContact.firstName" />
<input type="text" ng-model="newContact.lastName" />
<input type="text" ng-model="newContact.email" />
<button ng-click="newContact.save()">Save</button>

var query = new Parse.Query(Parse.Object.extend('Contact'));
ParseQuery(query, {functionToCall:'first'}).then(function(obj){
    $scope.newContact = new ParseObject(obj, ['firstName','lastName','email']);
});