Thank you for your answer.
In fact, the need I have is to get the last history regardless of the filed, the same way I can get the last comment.
And, I would like to be able to get the last history of the ticket, because the last update depends on it, and I can often see a ticket having been recently updated, without a real change on it. And when I look in the history I notice that someone changed the assignee, or the severity, or whatever other information that has no real value to me.
So, in order to track if the update of the ticket is meaningful I would like to get the “body” of the last history.
I’d very much appreciate getting that information, no worries if this is not possible. I’ll manage my need somehow.