Simply replace your existing relevance with it, but ensure you apply URL encoding before executing it in the browser.
**https://YOUR_BFX_SERVER:52311/api/query?relevance=(NEW_SESSION_Relevance_Query)
**
For URL encoding you can use following website:
URL Decoder/Encoder
Post URL encoding API query will look like below:
https://YOUR_BFX_SERVER:52311/api/query?relevance=(((if%20exists%20values%20of%20it%20then%20values%20of%20it%20as%20string%20else%20%22N%2FA%22)%2C%20name%20of%20computer%20of%20it%20as%20string)%20of%20results%20whose%20(exist%20computer%20whose%20(name%20of%20it%20as%20string%20%3D%20%22YOUR_Device%22)%20of%20it)%20of%20bes%20property%20whose%20(name%20of%20it%20as%20string%20as%20lowercase%20%3D%20%22Your_Analysis%22%20as%20lowercase))