class ConfigAssignPropertiesForVnf {

    @Override
    public String toString() {

        final StringBuilder sb = new StringBuilder("{");
        sb.append("\"service-instance-id\":").append("\"").append(serviceInstanceId).append("\"");
        sb.append(", \"vnf-id\":").append("\"").append(vnfId).append("\"");
        sb.append(", \"vnf-name\":").append("\"").append(vnfName).append("\"");
        sb.append(", \"service-model-uuid\":").append("\"").append(serviceModelUuid).append("\"");
        sb.append(", \"vnf-customization-uuid\":").append("\"").append(vnfCustomizationUuid).append("\"");
        for (Map.Entry<String, Object> entry : userParam.entrySet()) {
            sb.append(",");
            sb.append("\"");
            sb.append(entry.getKey());
            sb.append("\"");
            sb.append(":");
            sb.append("\"");
            sb.append(entry.getValue());
            sb.append("\"");
        }
        sb.append('}');

        return sb.toString();
    }

}