s" : [                        (json array) array of numbers
        n,                                 (numeric) transactions before this one (by 1-based index in 'transactions' list) that must be present in the final block if this one is
        ...
      ],
      "fee" : n,                           (numeric) difference in value between transaction inputs and outputs (in satoshis); for coinbase transactions, this is a negative Number of the total collected block fees (ie, not including the block subsidy);