I need to update the alues of the paragraph fields programatically.

Tha paragraph has been created before and it is hosted in a node and I want to update the values in the paragraph fields   programmatically when an event is launched.

I don't need to create the paragraph, the paragraph already exists.

I can identify the node through the ID, and how I can identify the paragraph? is there also an ID, and then how can I get the paragraph ID's for an specific node?

Any ideas where to start,

Thanks!