Hearthstone added something similar for decks (even made it human readable):

  ### Starting Party
  # 
  # Cariel Roame
  #   - Tome of Light 4
  # Xyrella
  #   - Robes of Purity 2
  # Rokara
  #   - Helm of Inspiration 1
  # Murky
  #   - Time to Krill 3
  # Millhouse Manastorm
  #   - Arcane Powder 1
  # Deathwing
  #   - Heart of Unliving 3
  # 
  CO+cmQQSDlN0YXJ0aW5nIFBhcnR5GAEiRQoJCBIQiwEYICAACgkIExDKARgjIAAKCQgLEIgBGAsgAAoLCLgCEOMCGLIEIAAKCAgOEB8YFCAACgsIqgIQygIYkgQgACgA
  # 
  # To use this deck, copy it to your clipboard and create a new deck in Hearthstone