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  •  Id: UUID of owner, stored as four ints. Optional. Used to update the other tags when the chunk loads or the holder logs in, in case the owner's name has changed.
  •  Name: Username of owner. If missing or empty, the head appears as a Steve head. Otherwise, used to store or retrieve the downloaded skin in the cache. Need not be a valid player name, but must not be all spaces.
  •  Properties
    •  textures
      • : An individual texture.
        •  Signature: Optional.
        •  Value: A Base64-encoded JSON object.[1]
          •  timestamp: Optional: Unix time in milliseconds.
          •  profileId: Optional: The hexadecimal text form of the player's UUID, without hyphens.
          •  profileName: Optional: Player name.
          •  isPublic: Optional.
          •  textures
            •  SKIN
              •  url: URL of a player skin on textures.minecraft.net.
            •  CAPE: Optional.
              •  url: URL of a player cape (64x32 PNG).