nifi-extension-bundles/nifi-standard-services/nifi-record-serialization-services-bundle/nifi-record-serialization-services/src/test/resources/avro/simple.avsc

{
  "namespace": "nifi",
  "name": "simple",
  "type": "record",
  "fields": [
    {"name": "msg", "type": "string"}
  ]
}