sed to generate receiving addresses; defined only for active descriptors
      "range" : [                 (json array, optional) Defined only for ranged descriptors
        n,                        (numeric) Range start inclusive
        n                         (numeric) Range end inclusive
      ],
      "next" : n,                 (numeric, optional) Same as next_index field. Kept for compatibility reason.
      "next_index" : n            (numeric, optional) The next index to generate addresses from;