bitcoin-bitcoin-core/test/util/data/blanktxv1.json

{
    "txid": "d21633ba23f70118185227be58a63527675641ad37967e2aa461559f577aec43",
    "hash": "d21633ba23f70118185227be58a63527675641ad37967e2aa461559f577aec43",
    "version": 1,
    "locktime": 0,
    "vin": [
    ],
    "vout": [
    ],
    "hex": "01000000000000000000"
}