{
  "banks": [
    {
      "name": "bank_1",
      "accounts": [
        {
          "type": "savings",
          "balance": 1000.00
        }, {
          "type": "checking"
        }, {
          "type": "investiment",
          "balance": null
        }
      ]
    }, {
      "name": "bank_2",
      "accounts": null
    }, {
      "name": "bank_3"
    }
  ]
}