diff --git a/src/ocean/utils/SignatureUtils.ts b/src/ocean/utils/SignatureUtils.ts
index 21da9bd..04cf97e 100644
--- a/src/ocean/utils/SignatureUtils.ts
+++ b/src/ocean/utils/SignatureUtils.ts
@@ -43,12 +43,12 @@ export class SignatureUtils {
         publicKey: string,
         password?: string
     ): Promise<string> {
+        const hash = this.web3.utils.utf8ToHex(text)
         const isMetaMask =
             this.web3 &&
             this.web3.currentProvider &&
             (this.web3.currentProvider as any).isMetaMask
         try {
-            const hash = this.web3.utils.utf8ToHex(text)
             return await this.web3.eth.personal.sign(hash, publicKey, password)
         } catch (e) {
             if (isMetaMask) {
@@ -57,7 +57,7 @@ export class SignatureUtils {
             this.logger.warn('Error on personal sign.')
             this.logger.warn(e)
             try {
-                return await this.web3.eth.sign(text, publicKey)
+                return await this.web3.eth.sign(hash, publicKey)
             } catch (e2) {
                 this.logger.error('Error on sign.')
                 this.logger.error(e2)