Is this a valid way to code up an MVC Service Layer?
protected bool ValidateAccount(Account account)
        {
            var accounts = _accountRepository.GetPk(account.PartitionKey);
            if (accounts.Any(b => b.Title.Equals(account.Title) &&
                                  !b.RowKey.Equals(account.RowKey)))
                _validationDictionary.AddError("", "Duplicate title");
            return _validationDictionary.IsValid;
        }

public bool Create(Account account)
{
    if (!ValidateAccount(account))
        return false;
    try
    {
        _accountRepository.AddOrUpdate(account);
    }
    catch
    {
        return false;
    }
    return true;
}

public ActionResult Create(BaseViewModel vm)
{
    _accountService = new AccountService(new ModelStateWrapper(this.ModelState), vm.Meta.DataSourceID);
    if (ModelState.IsValid)
    {

            _accountService = new AccountService(new ModelStateWrapper(this.ModelState), vm.Meta.DataSourceID);
            if (!_accountService.Create(vm.Account))
                return View("CreateEdit", vm);
            else
                return RedirectToAction("Created");
        }
        return RedirectToAction("Home");
    }
    return View("CreateEdit", vm);
}