randomObject.js

function randomString(bytes) {
  let arr = new Array(bytes).fill(0);
  arr = arr.map(_ => Math.floor(Math.random() * 256));
  return btoa(arr);
}

const idLen = 16;
function randomObject(depth, width) {
  const r = {};
  for(let i = 0; i < width; i++) {
    if(depth == 0) {
      r[randomString(idLen)] = i;
    } else {
      r[randomString(idLen)] = randomObject(depth-1, width);
    }
  }
  return r;
}