{
    "type": "cosmos-sdk/StdTx",
    "value": {
        "msg": [
            {
                "type": "auction/MsgPlaceBid",
                "value": {
                    "auction_id": "1",
                    "bidder": "kava1xy7hrjy9r0algz9w3gzm8u6mrpq97kwta747gj",
                    "amount": {
                        "denom": "usdx",
                        "amount": "100000000"
                    }
                }
            }
        ],
        "fee": {
            "amount": [],
            "gas": "500000"
        },
        "signatures": [
            {
                "pub_key": {
                    "type": "tendermint/PubKeySecp256k1",
                    "value": "AsBYqm9S7cjIBdG6N/xzAGuEizTt2S2CJuM1FCsgta7u"
                },
                "signature": "O3zsB8P61SN7/5C+TNfO9hMaFYWV6hjr2aVigN0GrckR2PQGZhpyEZ03P71A9uK7DFLawzvAHDZRqQu833lAnA=="
            }
        ],
        "memo": "arbitrary text"
    }
}