/construction/submit malformed value

[leezijie]

Describe the bug
This error was reported when I submitted a signed transaction.
{"code":17,"message":"malformed value","retriable":false}

This is request body
Oasis does not require sub_network_identifier

curl 'http://localhost:8080/construction/submit' -d '{
"network_identifier": {
"blockchain": "Oasis",
"network": "53852332637bacb61b91b6411ab4095168ba02a50be4c3f82448438826f23898"
},
"signed_transaction": "a6e54d42f3a0c25eab2eeff904e9ce5894a0a553f6dae46257346114a9114b3c9cb2a0d0766350148428d1cadc2f4425ef8611604a65e1a38999ed07647acc03"
}'