using Testnet with simple e2e test and encountering 400 Bad Request always, The error message shows: "Invalid transaction (InvalidSignature): Transaction signature is invalid"

[Salmon-x]

This is generated tx

{"asset":{"data":{"bicycle":{"manufacturer":"bkfab","serial_number":"abcd1234"}}},"id":"5514977c8b748fff3158b8a6cf5d65a6c9a8af01f8641cfcf3e0bbef46c97f3c","inputs":[{"fulfillment":"pGSAIMVNKBqLpW7mj0s5BTgwuWGxzP-Csrfx3s9o6BqgnNPZgUAAoFO_5AyISgJsOVWZayLwujgf9q7klXo4TWK6KoSN8YwEvCrSyd6zf-VI8jN78RbyqHfKLajTQndG4SkY1FUL","fulfills":null,"owners_before":["EHBZ9KFu3xiaZieaERRwJhTVxfwvfrQdZbuje5UNs1V2"]}],"metadata":{"planet":"earth"},"operation":"CREATE","outputs":[{"amount":"1","condition":{"details":{"public_key":"EHBZ9KFu3xiaZieaERRwJhTVxfwvfrQdZbuje5UNs1V2","type":"ed25519-sha-256"},"uri":"ni:///sha-256;xU0oGoulbuaPSzkFODC5YbHM_4Kyt_Hez2joGqCc09k?fpt=ed25519-sha-256&cost=131072"},"public_keys":["EHBZ9KFu3xiaZieaERRwJhTVxfwvfrQdZbuje5UNs1V2"]}],"version":"2.0"}