Hi!
Try with this expression
concat(first(split('https://app-messagingservices-dev.azurewebsites.net/api/v1.0/Products/wellez93','Products/')),'Products/')
Just need to replace
'https://app-messagingservices-dev.azurewebsites.net/api/v1.0/Products/wellez93'
and add whatever output the URL is currently stored
Hope this helps