That's the question. I read the manual, other topics, googled it and etc., but all I found was some API Kung Fu and I just don't get how to apply it to my configuration.
I mean, I have the ELK stack + filebeats, all logs are shipped and parsed nicely. Automatically. And there was no need to make any mappings through curl, json-queries and etc.
So I expect there to be some GUI ot at least a 'set via a wildcard' way to make changes in bulk to fields I need.