I'm experimenting with creating zones via the API using "updatezone". I've generated a cURL sample, and the only response I'm ever able to get from the API is a 406. The default example appears to be incorrect in that it says to us "-d" instead of "--data-raw" since the string begins with @. It similarly doesn't work with -d and an RFC1035 formatted text file. I've also tried this with a URLencoded data field in querystring format, even though it isn't recommended. The only response is 406 every time. I am not specifying a zonegroup as that's optional, nor a masterip since this is a primary zone.