Add NTF support (Tokens CC V2)

An example of image opreturn format

{
  "name": "Duke Khanplum",
  "image": "https://storage.googleapis.com/ck-kitty-image/0x06012c8cf97bead5deae237070f9587f8e7a266d/1500718.png",
  "description": "Heya. My name is Duke Khanplum, but I've always believed I'm King Henry VIII reincarnated."
}

ref: https://opensea.io/blog/guides/non-fungible-tokens/#Programmability