{
    "fields": {
        "album": "A Head Full of Dreams",
        "artist": "Coldplay",
        "year": 2015,
        "category_scores": {
            "cells": [
                { "address" : { "cat" : "pop" },  "value": 1 },
                { "address" : { "cat" : "rock" }, "value": 0.2 },
                { "address" : { "cat" : "jazz" }, "value": 0 }
            ]
        }
    }
}