Retrieve data and update entity

Problem/Motivation

I have an entity type which is created/updated by authenticated users and also have a webform for anonymous users. On the workflow, the authenticated user creates a entity, fills the fields and after saving it a rule is triggered to sent an e-mail to a specified address previously filled in the form. In this e-mail, besides some given information a link is also informed to this user anonymously fill a webform. This webform has a hidden field entity id, which is filled with the data from the given url link(https://mysite.com/request-help?entity_id=[request:id]) through the e-mail. Everything is working fine until now, but the next step is to create a rule that send(fill a field), to the previously created entity, the submission id link. Perhaps I still need to retrieve some more data from the submission, but for now I'm stucked on this.

Is it possible to achieve this with this module? I hope I made myself clear.

Thanks in advance!