          (numeric, optional) The block median time past
  "mediantxsize" : n,          (numeric, optional) Truncated median transaction size
  "minfee" : n,                (numeric, optional) Minimum fee in the block
  "minfeerate" : n,            (numeric, optional) Minimum feerate (in satoshis per virtual byte)
  "mintxsize" : n,             (numeric, optional) Minimum transaction size
  "outs" : n,                  (numeric, optional) The number of outputs
  "subsidy" : n,               (numeric, option