Passing context values to rasa

Hi, I am creating an IoT chatbot which helps in controlling devices like light, ac etc. In this scenario I want to pass the details of all the devices the users has configured to rasa as context.

I’m sending the user request using http://localhost:5005/webhooks/rest/webhook with body {“message”:“turn on light”}

Can i send my data along with the above body so that I can check the dialog conditions with that in stories.

I’m new to rasa, so please help me in fixing this issue.