Here's a link:

https://patentscope.wipo.int/search/en/detail.jsf?docId=WO2020060606

The description tab is an interesting read. The body activity they intend to sense includes brain activity, so I guess you'll need a sensor somewhere around your forehead...

This bit stands out. Note the misspelling of "humans", and consider the implications for people who don't wish to use these devices:

[0035] Furthermore, the task(s) provided by task server 110 can include solving a test for distinguishing human from machine input so that humans but not computers are able to pass it, such as, Computer Automated Program to Tell Computers and Flumans Apart (CAPTCHA) and reCAPTCHA which is a CAPTCHA-like system designed to establish that a computer user is human. The task may require user 145 to solve a verification challenge, for example, but not limited to, an image based challenge including instructions prompting user 145 to solve the challenge through interaction with one or more images.