I am able to implement Platform Event within Salesforce object but I am looking for this implementation with External System. I have created an API in Ruby on Rails which load data into postgressql. I am calling this Rails API from Salesforce APEX class which is working fine but want to implement it with Salesforce platform event. Could you please help me how I can achive this functionality.

Scenario-
1. I have a Account object in Salesforce
2. Created a Platform event where data store once add any data into Account object
3. I could see Platform Evenet objetc is having required data
4. Now I want to push this data into RAILS API which will load into Heroku Postgressql. Please note, I am not looking this implementation with heroku Connect. Is there any way to implement this functionality with platform event?