[
  {
    "foo": {
      "$numberInt": "1"
    },
    "notes": "simple value"
  },
  {
    "foo": [
      {
        "$numberInt": "1"
      }
    ],
    "notes": "single element array"
  },
  {
    "foo": [
      {
        "$numberInt": "1"
      },
      {
        "bar": {
          "$numberInt": "1"
        }
      },
      {
        "bar": {
          "baz": {
            "$numberInt": "1"
          }
        }
      }
    ],
    "notes": "three element array where first value is simple; second value is object with one field; third value is object with object with one field"
  }
]