jects (sorted by descriptor string representation)
    {                             (json object)
      "desc" : "str",             (string) Descriptor string representation
      "timestamp" : n,            (numeric) The creation time of the descriptor
      "active" : true|false,      (boolean) Whether this descriptor is currently used to generate new addresses
      "internal" : true|false,    (boolean, optional) True if this descriptor is used to generate change addresses. False if this descriptor is u