Take a piece of paper.
Write Gokumarket on it.
Write the Current Date.
Now, Sign on the paper below the date. (The signature on the ID and on the paper should be same)
Now hold the Passport and the paper close to your face and click a selfie. (Note the image size should not be more than 5 MB).
Click on the Selfie button and select the selfie image and click on Submit.