diff --git a/core/types/transaction.go b/core/types/transaction.go
index 95c460dc6..acf6a713d 100644
--- a/core/types/transaction.go
+++ b/core/types/transaction.go
@@ -177,6 +177,8 @@ const (
 	// it needs a signer that signs
 	SignedMsgConcat SignedMsgSerializationType = "concat"
 
+	SignedMsgDirect SignedMsgSerializationType = "direct"
+
 	// DefaultSignedMsgSerType is the default serialization type
 	// It's `concat` for now, since it's the only one known works for every signer
 	DefaultSignedMsgSerType = SignedMsgConcat
@@ -184,6 +186,16 @@ const (
 
 // CreateTransaction creates a new unsigned transaction.
 func CreateTransaction(contents Payload, chainID string, nonce uint64) (*Transaction, error) {
+	return createTransaction(contents, chainID, nonce, DefaultSignedMsgSerType)
+}
+
+// CreateNodeTransaction creates a new unsigned transaction with the "direct"
+// serialization type.
+func CreateNodeTransaction(contents Payload, chainID string, nonce uint64) (*Transaction, error) {
+	return createTransaction(contents, chainID, nonce, SignedMsgDirect)
+}
+
+func createTransaction(contents Payload, chainID string, nonce uint64, sert SignedMsgSerializationType) (*Transaction, error) {
 	data, err := contents.MarshalBinary()
 	if err != nil {
 		return nil, err
@@ -197,7 +209,7 @@ func CreateTransaction(contents Payload, chainID string, nonce uint64) (*Transac
 			Nonce:       nonce,
 			ChainID:     chainID,
 		},
-		Serialization: DefaultSignedMsgSerType,
+		Serialization: sert,
 	}, nil
 }
 
@@ -240,6 +252,13 @@ func (t *TransactionBody) SerializeMsg(mst SignedMsgSerializationType) ([]byte,
 	}
 
 	switch mst {
+	case SignedMsgDirect:
+		msg, err := t.MarshalBinary()
+		if err != nil {
+			return nil, fmt.Errorf("failed to serialize transaction body: %v", err)
+		}
+		sigHash := crypto.Sha256(msg) // could just be msg
+		return sigHash[:], nil
 	case SignedMsgConcat:
 		// Make a human-readable message using a template(txMsgToSignTmplV0).
 		// In this message scheme, the displayed "token" is a hash of the
diff --git a/node/services/jsonrpc/adminsvc/service.go b/node/services/jsonrpc/adminsvc/service.go
index 489de4f20..f94eebb57 100644
--- a/node/services/jsonrpc/adminsvc/service.go
+++ b/node/services/jsonrpc/adminsvc/service.go
@@ -299,7 +299,7 @@ func (svc *Service) sendTx(ctx context.Context, payload ktypes.Payload) (*userjs
 		return nil, jsonrpc.NewError(jsonrpc.ErrorAccountInternal, "account info error", nil)
 	}
 
-	tx, err := ktypes.CreateTransaction(payload, svc.chainID, uint64(nonce+1))
+	tx, err := ktypes.CreateNodeTransaction(payload, svc.chainID, uint64(nonce+1))
 	if err != nil {
 		return nil, jsonrpc.NewError(jsonrpc.ErrorInternal, "unable to create transaction", nil)
 	}