Crash during deserialision json to protocol buffers in Objective C

This is the code I am using to get a json object

NSString *requestString = @"http://url/joual/";
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:requestString]];
NSError* error;
NSArray *jsonDataArray = [[NSArray alloc] initWithArray:[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error]];

NSDictionary *dictObject = [jsonDataArray objectAtIndex:1];
//NSLog(@"%@", [dictObject valueForKey:@"deviceA"]);
NSData *jsonJobData = [NSJSONSerialization dataWithJSONObject:dictObject options:kNilOptions error:&error];
JoualEntry  *aJobEntry = [JoualEntry parseFromData:jsonJobData];

The jsonDataArray after serialization is

 (
        {
        callGroupId = 1458762093348;
        callType = "NOT_RESPONDING";
        callerInfoB =         (
                        {
                firstName = "";
                lastName = M5T2;
              }
        );
        createdTime = 1460633282;
        deviceA = "++30(210)3453-342";
        deviceB = 109;
        direction = INCOMING;
        duration = 0;
     },
        {
        callGroupId = 1458762093361;
        callType = "NOT_RESPONDING";
        callerInfoB =         (
                        {
                firstName = "";
                lastName = M5T5;
            }
        );
        createdTime = 1460634071;
        deviceA = "+30(210)3453-342";
        deviceB = 108;
        direction = INCOMING;
        duration = 0;
    }
)

I am using protobuf.io for objective c and I want to save those two joual entries to a protobuf generated class. However my code is crashing when I am trying to map json to objective c.

It is possible to read the json contents for example [dictObject valueForKey:@"deviceA"] retus correct data, however when I am trying to use parseFromData the app crashes and more specifically throws an exception here:

- (void) checkLastTagWas:(SInt32) value {
  if (lastTag != value) {
    @throw [NSException exceptionWithName:@"InvalidProtocolBuffer" reason:@"Invalid End Tag" userInfo:nil];
  }
}

What I am doing wrong? Is the json file OK?