What does this customfield contain?

[Gary]

I'm using Python 3.7.4 to access atlassian.net and get information about our stories.  One of the fields "fields.customfield_10001" sometimes contains None, but usually contains string data that looks like one of these two lines:

10000_*:*_1_*:*_1619523246_*|*_10001_*:*_1_*:*_0
   < or >
10000_*:*_1_*:*_499083397_*|*_10001_*:*_1_*:*_0_*|*_10201_*:*_1_*:*_1120396215

Any idea what this data is, and how to translate it into something meaningful? 

Thanks, Gary

[Nic_Brough__Adaptavist_]

It's data for one of the gadgets - "time in status" I believe.  I'm not sure how to read it, I've never looked at it too closely.  It's done with an encoded field rather than reading the history, because the history is quite intensive to read, and it's better to have a field that is updated whenever the status changes instead.