Get Recency × Frequency heatmap

{
    "subset": "all",
    "xDim": "f",
    "yDim": "r",
    "size": 5,
    "cells": [
        {
            "r": 5,
            "f": 3,
            "m": 1,
            "population": 120,
            "revenues": 2500.25,
            "populationPerc": 0.034,
            "revenuesPerc": 0.071
        }
    ]
}