Failed broadcast tx signed by ledger about cosmos-client-ts HOT 1 OPEN

In cosmos-sdk gt v0.4x.0, the binary data for signing is the binary data encoded with protocol buffer. In concrete, data which can be seen via signDocBytes method in TxBuilder class.
signDocBytes is procol buffer-encoded binary of SignDoc.

How about inputting the output of signDocBytes method of TxBuilder class, to the argument of

const signatures = await this.ledgerClient.signTransaction(
        JSON.stringify(rawSendTx), // replace here
)

In cosmos-sdk gt v0.4x.0, signature for the JSON string of transaction data can't be used for transaction signature.

from cosmos-client-ts.