Below is the link for the Nissan towing guide. It says on page 25 that the GCWR is 1100 pounds with 6000 pounds of towing and 600 pound maximum hitch weight.
https://www.nissanusa.com/pdf/techpu...owingGuide.pdf
Below is a link for the trailer specs. The gross vehicle weight of your trailer is 6800 pounds and the dry hitch weight is 515 pounds.
https://www.keystonerv.com/travel-tr...assport/specs/
In my opinion, you are really pushing the capability of your tow vehicle. Obviously, this is just my opinion and I am only trying to provide helpful information.