Reduce oven temperature to 325°F (165°C).
Beat cream cheese until smooth, then add sugar and mix until combined.
Add eggs one at a time, mixing on low speed after each addition.
Stir in heavy cream, vanilla extract, and salt.
Pour over cooled cake layer.
Wrap outside of pan with aluminum foil and place in a water bath.
Bake for 60-70 minutes until center is almost set but still slightly jiggly.
Turn off oven, crack door open, and let cool for 1 hour.
Remove from oven and refrigerate for at least 4 hours or overnight.