diff --git a/core/src/main/java/tech/ydb/core/auth/JwtUtils.java b/core/src/main/java/tech/ydb/core/auth/JwtUtils.java
index 1ca346e0..e82e24b5 100644
--- a/core/src/main/java/tech/ydb/core/auth/JwtUtils.java
+++ b/core/src/main/java/tech/ydb/core/auth/JwtUtils.java
@@ -23,48 +23,12 @@ public class JwtUtils {
     private JwtUtils() { }
 
     private static class JwtClaims {
-        @SerializedName("iss")
-        private String issuer;
-        @SerializedName("sub")
-        private String subject;
-        @SerializedName("aud")
-        private String audience;
         @SerializedName("exp")
         private Long expiredAt;
-        @SerializedName("nbf")
-        private Long notBeforeAt;
-        @SerializedName("iat")
-        private Long issuedAt;
-        @SerializedName("jti")
-        private String jwtID;
-
-        public String getIssuer() {
-            return this.issuer;
-        }
-
-        public String getSubject() {
-            return this.subject;
-        }
-
-        public String getAudience() {
-            return this.audience;
-        }
 
         public Long getExpiredAt() {
             return this.expiredAt;
         }
-
-        public Long getNotBeforeAt() {
-            return this.notBeforeAt;
-        }
-
-        public Long getIssuedAt() {
-            return this.issuedAt;
-        }
-
-        public String getJwtID() {
-            return this.jwtID;
-        }
     }
 
     public static Instant extractExpireAt(String jwt, Instant defaultValue) {
diff --git a/core/src/test/java/tech/ydb/core/auth/JwtUtilsTest.java b/core/src/test/java/tech/ydb/core/auth/JwtUtilsTest.java
new file mode 100644
index 00000000..3bd77750
--- /dev/null
+++ b/core/src/test/java/tech/ydb/core/auth/JwtUtilsTest.java
@@ -0,0 +1,27 @@
+package tech.ydb.core.auth;
+
+import java.time.Instant;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ *
+ * @author Aleksandr Gorshenin
+ */
+public class JwtUtilsTest {
+
+    @Test
+    public void parseTest() {
+        // { "alg": "HS256", "typ": "JWT" }.{ "sub": "1234567890", "iat": 1516239022, "exp": 1726544488 }
+        String jwt1 = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwiaWF0IjoxNTE2MjM5MDIyLCJleHAiOjE3MjY1NDQ0ODh9";
+        // { "alg": "HS256", "typ": "JWT" }.{ "aud":  "Base", "sub": "1234567890", "iat": 1516239022, "exp": 1726544488 }
+        String jwt2 = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOiJCYXNlIiwic3ViIjoiMTIzNDU2Nzg5MCIsImlhdCI6MTUxNjIzOTAyMiwiZXhwIjoxNzI2NTQ0NDg4fQ";
+        // { "alg": "HS256", "typ": "JWT" }.{ "aud": [ "Base" ], "sub": "1234567890", "iat": 1516239022, "exp": 1726544488 }
+        String jwt3 = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOlsiQmFzZSJdLCJzdWIiOiIxMjM0NTY3ODkwIiwiaWF0IjoxNTE2MjM5MDIyLCJleHAiOjE3MjY1NDQ0ODh9";
+
+        Assert.assertEquals(Instant.ofEpochSecond(1726544488), JwtUtils.extractExpireAt(jwt1, Instant.EPOCH));
+        Assert.assertEquals(Instant.ofEpochSecond(1726544488), JwtUtils.extractExpireAt(jwt2, Instant.EPOCH));
+        Assert.assertEquals(Instant.ofEpochSecond(1726544488), JwtUtils.extractExpireAt(jwt3, Instant.EPOCH));
+    }
+}