How to represent complex objects in Ember models?

This SO question explains how to store an array in an Ember model, but how could it be done with a custom object, which also isn't supported natively supported, according to the Guides.

This is an example of the object that I am building

obj[0] = {"timeInMinutes": ">120", "occurrences": 24 };
obj[1] = {"timeInMinutes": "90-120","occurrences": 69 };
obj[2] = {"timeInMinutes": "60-90", "occurrences":  53 };
obj[3] = {"timeInMinutes": "30-60", "occurrences": 35  };
obj[4] = {"timeInMinutes": "0-30", "occurrences": 24 };