It depends on your individual Situation. A question to you: is it any benefit to your career trajectory?.
I think with resumes, there should be red thread that runs through your experiences that allows you to tell a Story verbally - will this Job fit into your Story?
Becareful have having a CV what could be percieved as a fragmented Assemblage of experiences with no Story to tell.
On the other Hand, Balance that with sometimes employers may want to see you're keeping yourself busy during a period of unemployement, ideally with an activitiy where you're learning something that is of value to your development.
If you put it one the CV, I recommend that you are clear in what your role and responsiblity is, like anything else on the resume, you are accoutable for what is written in the CV.
I'm not going to comment on the activity itself, that's for you to decide and judge how and if you carry on. As is, whether you choose to add it to your CV in consideration of the above.
So from my end, I can't tell you whether to put it or not - but consider the above and take the decision.