Dear Spigot Plugin Dev. Community; I am making a small Pigeon Mail plugin so that players can send a private message at a time to each-other, and I want to make it a little more special than doing a /privatemessage <receiver> <message> type of thing. I am planning on having a carrot on a stick item look like a pigeon and when the player left-clicks on the item, an inventory GUI or something similar to be shown to put in a name-tagged paper, so the server knows to whom the message is for, and a book and quill for the message itself. My main question is how I add the NBT tags that are used in creation of datapacks? Please include code or add a link to a recent thread that talks about a current, 1.15.1, version of minecraft. Sincerely, Adrian_Kelly.