Play Spatial Audio

I want to play RealityKitContent USDA model's Spatial Audio, I use this code:

                RealityView{ content in
                        do {
                            let entity = try await Entity(named: "isWateringBasin", in: RealityKitContent.realityKitContentBundle)
                            let audio = entity.spatialAudio
                            entity.playAudio(audio)
                            content.add(entity)
                        } catch {
                            print("Entity encountered an error while loading the model.")
                            return
                        }
                    }

entity.playAudio(audio) this code need add a 'AudioResource' back of audio, Excuse me, what should AudioResource be?