customerprofile.avsc

{
 "namespace": "example.avro",
 "type": "record",
 "name": "CustomerProfile",
 "fields": [
     {"name": "name", "type": "string"},
     {"name": "next_best_action", "type": ["string", "null"]},
     {"name": "loyalty_card_number", "type": ["string", "null"]},
     {"name": "customer_type", "type": ["string", "null"]},
     {"name": "estimated_lifetime_value", "type": ["int", "null"]},
     {"name": "purchase_history", "type" : {
        "type" : "array",
        "items" : {
                "type": "record",
                "name" : "ProductPurchase",
                "fields" : [
                    {"name" : "item" , "type" : "string"},
                    {"name" : "code", "type" : "string"},
                    {"name" : "quantity" , "type" : "int"},
                    {"name" : "event_date", "type" : "string"}
                ]
            }
        }
     }
    ]
}