{
  "type": "record",
  "name": "User",
  "doc": "Hi there.",
  "fields": [
    {"name": "name", "type": "string", "default": ""},
    {"name": "favorite_number",  "type": "int", "default": 7},
    {"name": "likes_pizza", "type": "boolean", "default": false},
    {"name": "oye", "type": "float", "default": 1.1},
    {"name": "aa_i32",
     "type": {"type": "array", "items": {"type": "array", "items": "int"}},
     "default": [[0], [12, -1]]}
  ]
}