Here, you'll find a collection of basic backbling plugin examples to assist you.
Red Shield to Black Shield
{"Name":"Red Shield to Black Shield","Icon":"https://fortnite-api.com/images/cosmetics/br/BID_004_BlackKnight/icon.png","Swapicon":"https://fortnite-api.com/images/cosmetics/br/BID_003_RedKnight/icon.png","Message":null,"Assets": [ {"AssetPath":"/Game/Characters/CharacterParts/Backpacks/Male_Commando_BlackKnight_V01","AssetPathTo":"/Game/Characters/CharacterParts/Backpacks/Male_Commando_BlackKnight" } ]}