{
  "schema": {
    "fields": [
      {
        "name": "address",
        "type": "RECORD",
        "mode": "NULLABLE",
        "description": "An address",
        "fields": [
          {
            "name": "street_address",
            "type": "STRING",
            "mode": "NULLABLE"
          }
        ]
      }
    ]
  }
}