{
  "DBInstanceIdentifier": "neptune-cluster-abc123",
  "DBInstanceClass": "db.r6g.large",
  "Engine": "neptune",
  "DBClusterIdentifier": "neptune-cluster-abc123",
  "AvailabilityZone": "us-east-1a",
  "PreferredMaintenanceWindow": "example-string",
  "AutoMinorVersionUpgrade": false,
  "PromotionTier": 22
}