share/schemas/org/apache/avro/data/Json.avsc

{"type": "record", "name": "Json", "namespace":"org.apache.avro.data",
 "fields": [
     {"name": "value",
      "type": [
          "long",
          "double",
          "string",
          "boolean",
          "null",
          {"type": "array", "items": "Json"},
          {"type": "map", "values": "Json"}
      ]
     }
 ]
}