aws/aws-sdk-go-v2

Hey all! I've been trying to do the following against Route53 with the v2 SDK ...

1. Create a Hosted Zone for a subdomain ("subdomain1.app.example.com")
2. Add NS record for subdomain1 to the parent Hosted Zone ("app.example.com")

Creating the Hosted Zone for the subdomain is no problem but adding the NS record fails with the following error message:
InvalidInput: Invalid request: Expected exactly one of [Weight, Region, Failover, GeoLocation, or MultiValueAnswer], but found none in Change with [Action=UPSERT, Name=subdomain1.apps.example.com., Type=NS, SetIdentifier=Upsert NS record]

If I use the AWS Management Console to add the NS record, I do not need to specify any of the above and it works great. What is the proper way of adding an NS record to a Hosted Zone? Can't find any examples out there for NS records.
Here's the code snippet I'm working with:

params := route53.ChangeResourceRecordSetsInput{
    ChangeBatch: &types.ChangeBatch{
        Changes: []types.Change{
            {
                Action: types.ChangeActionUpsert,
                ResourceRecordSet: &types.ResourceRecordSet{
                    Name:            "subdomain1.app.example.com",
                    Type:            types.RRTypeNs,
                    ResourceRecords: []types.ResourceRecord{
                        ... values goes here ...
                    },
                    TTL:             aws.Int64(300),
                    SetIdentifier:   aws.String("Upsert NS record"),
                },
            },
        },
        Comment: aws.String("Upserting NS record in parent zone"),
    },
    HostedZoneId: aws.String("<id of parent zone app.example.com>"),
}
res, err := r.Route53.ChangeResourceRecordSets(ctx, &params)

Any help would be much appreciated!