private static Either<String, RegistrationsUpdate> registrationsUpdate(JsonNode jsonNode) {
    Either<String, BillingCompany> billingCompany =
        ArgoUtils.stringValue(jsonNode, "billingCompany").right().map(BillingCompany::new);
    Either<String, Badge> badge = ArgoUtils.stringValue(jsonNode, "badge").right().map(Badge::new);
    Either<String, String> dietaryRequirements =
        ArgoUtils.stringValue(jsonNode, "dietaryRequirements");
    Either<String, Option<String>> bundle =
        ArgoUtils.stringValue(jsonNode, "bundle")
            .right()
            .map(Option::fromNull)
            .right()
            .map(r -> r.filter(Strings.isNotNullOrEmpty));

    return bundle
        .right()
        .apply(
            dietaryRequirements
                .right()
                .apply(
                    badge
                        .right()
                        .apply(
                            billingCompany
                                .right()
                                .apply(Either.right(Function.curry(RegistrationsUpdate::new))))));
  }
  @POST
  @Path("/{registrationId}")
  @Consumes(MediaType.APPLICATION_JSON)
  @Produces(MediaType.APPLICATION_JSON)
  public Response postUpdate(
      @Context HttpServletRequest request, @PathParam("registrationId") UUID id, String body)
      throws Exception {
    authService.guardAuthenticatedUser(request);
    Either<String, RegistrationsUpdate> map =
        ArgoUtils.parseEither(body)
            .right()
            .map(x -> x.getNode("tuple"))
            .right()
            .bind(RegistrationsRestService::registrationsUpdate);

    if (map.isLeft()) return Response.serverError().build();
    RegistrationsUpdate ru = map.right().value();

    try (Connection c = dataSource.getConnection()) {
      c.setAutoCommit(false);
      if (!registrationsSqlMapper.one(c, id).isSome())
        return Response.status(Status.NOT_FOUND).build();
      registrationsSqlMapper.update(
          c, id, ru.billingCompany, ru.badge, ru.dietaryRequirements, ru.bundle);
      c.commit();
    }
    return Response.ok().build();
  }