diff --git a/src/MetaHash.php b/src/MetaHash.php
index ea17e46..14ae8ab 100644
--- a/src/MetaHash.php
+++ b/src/MetaHash.php
@@ -563,6 +563,7 @@ public function queryProxy(string $method, array $params = []): array
     public function sendTx(string $privateKey, string $to, int $value, string $data = '', int $nonce = 1, int $fee = 0): array
     {
         $metaHashCrypto = $this->getMetahashCrypto();
+        $data = $data === '' ? $data : $metaHashCrypto->str2hex($data);
         $signText = $metaHashCrypto->makeSign($to, $value, $nonce, $fee, $data);
         $sign = $metaHashCrypto->sign($signText, $privateKey);
 
@@ -571,7 +572,7 @@ public function sendTx(string $privateKey, string $to, int $value, string $data
             'value'  => (string)$value,
             'fee'    => (string)$fee,
             'nonce'  => (string)$nonce,
-            'data'   => $metaHashCrypto->str2hex($data),
+            'data'   => (string)$data,
             'pubkey' => $metaHashCrypto->privateToPublic($privateKey),
             'sign'   => $sign,
         ];
diff --git a/src/MetaHashCrypto.php b/src/MetaHashCrypto.php
index 7a867ae..fe3707c 100644
--- a/src/MetaHashCrypto.php
+++ b/src/MetaHashCrypto.php
@@ -268,8 +268,6 @@ public function checkAdress(string $address): bool
      */
     public function makeSign(string $address, int $value, int $nonce, int $fee = 0, string $data = '')
     {
-        $data = $data === '' ? $data : $this->str2hex($data);
-
         $addressClear = (\strpos($address, '0x') === 0) ? \substr($address, 2) : $address;
         $valueUInt = IntHelper::VarUInt($value, true);
         $feeUInt = IntHelper::VarUInt($fee, true);