UGC activity node creation in AEM Social community

[#1]

ow can we create activity node using custom social community component. OOTB components create node. In my case, i am able to push data to mongo db by using SRP APIs. Which API will help to create below related node while update/create operation.

eg: "resource_type_s" : "social/activitystreams/components/activity" {}

I have created a custom component which is pushing data to mongo.

Does commentSystem API will help to create activity node?

Adobe Social​

[#2]

Yes and no. commentSystem API will help to create activity node. but you also need to use some social media to check all steps. I would take Facebook or Instagram and then just push to see some changes. or just buy social media followers and ask them to comment on it.  API have to check it