Referencing the heartbeat module in actions

Hi All,

I am in the middle of creating a small drupal based social media site and I am using the heartbeat module as a sort of news feed with all the latest updates of other users. I have created a heartbeat template for when a users adds a new photo and in the content section of the template under ‘single message’ I have input the code:

Only local images are allowed.

This I hope will create a picture of the users, the users username and the picture they are uploading.

The issue I have is when I am referencing the heartbeat template in the rules section of config there are the following options under actions:
Entity ID
User ID
Entity Target ID
User Target ID
Comment ID

I am struggling iwth what to enter in these fields, any help would be appreciated.