 used. Watch-only destinations are solvable if the public key and/or output script was imported,
                                      e.g. with 'importpubkey' or 'importmulti' with the 'pubkeys' or 'desc' field.
       "lockUnspents": bool,          (boolean, optional, default=false) Lock selected unspent outputs
       "feeRate": amount,             (numeric or string, optional, default=not set: makes wallet determine the fee) Set a specific fee rate in BTC/kB
       "subtractFeeFromOutputs": [    (json a