Tapping noise coming from right rear

[jht7]

I have a 2010 Rogue 360 that has a faint tapping noise coming from the right rear of the vehicle. It only taps once or twice and only does it sometimes while slowing down or very low speeds. It sounds like plastic hitting metal. I have checked everything in the rear cargo area, the rear wheel bearing seems fine and nothing looks to be loose under the vehicle. Can onyone help?