src/main/java/ru/soune/nocopy/controller/ApiController.java

@@ -66,7 +66,13 @@ public class ApiController {
             throw e;
         } catch (Exception e) {
             log.error("Handler execution failed for msgId: {}", msgId, e);
-            throw new RuntimeException("Handler execution failed", e);
+
+            BaseResponse errorResponse = new BaseResponse(msgId,
+                    MessageCode.INVALID_JSON_BODY.getCode(),
+                    MessageCode.INVALID_JSON_BODY.getDescription(),
+                    new HashMap<>());
+
+            return ResponseEntity.ok().body(errorResponse);
         }
     }
 

src/main/java/ru/soune/nocopy/dto/MessageCode.java

@@ -4,6 +4,7 @@ public enum MessageCode {
     SUCCESS(0, "Operation successful"),
     REG_EMAIL_EXISTS(1, "Email already registered"),
     INVALID_FIELD(2, "Invalid field"),
+    INVALID_JSON_BODY(2, "Invalid fields in JSON object"),
     MSG_ID_NOT_FOUND(4, "Message id not found"),
 
     AUTH_EMAIL_NOT_FOUND(4, "Email not found"),