Elapsed time of a snap

I’m trying to find the start/end timestamps and elapsed time of a REST Post snap for a single request using the Runtime API.

In Postman, I supplied the following:
https://elastic.snaplogic.com/api/1/rest/public/runtime/orgname/ruuid?level=detail

What am I supposed to be looking for to extract the necessary timestamps?
Is “snap.out_time_ms” what I should be looking at?
What is “in_time_ms”? It doesn’t “translate” into a realistic timestamp or elapsed time.
e.g.
“in_time_ms”: 1305003,

“out_time_ms”: 6,