Simple IFTTT recipe

I want to achieve the thing with Google Home and IFTTT. * If I say ******, * Play the music that in the particular folder in Dropbox. But unfortunately I am not sure how I should write text in the content area of Dropbox “Create a text file” (attached the capture image) Who can let me know the text? I go to pay the money after checking the code operation. The requirement is, * Send the right text that enable my demand via messenger, then I go to check and pay for it. Best Regards,