NTFY Report Human Readable Time

So im using a report file to customise a json request sending it to a self hosted NFTY instance. I can get the notification to work but i would like to do some better formatting. The time variable is the UNIX time stamp - im wondering is there a way to make this human readable?

I know the report file can support golang but im not sure how this can be used to convert the UNIX time to human readable time stamp.