y
    "time" : n,             (numeric) local time transaction entered pool in seconds since 1 Jan 1970 GMT
    "height" : n,           (numeric) block height when transaction entered pool
    "descendantcount" : n,  (numeric) number of in-mempool descendant transactions (including this one)
    "descendantsize" : n,   (numeric) virtual transaction size of in-mempool descendants (including this one)
    "descendantfees" : n,   (numeric) modified fees (see above) of in-mempool descendants (including this one