Block definition writed in entities section

[solex94]

Hello. First of all, I want to congratulate you on this very good project.
I'm new to using DXFighter and I'm trying to define a block by:

$dxf = new \DXFighter\DXFighter();
$aBlock = new \DXFighter\lib\Block('MyBlock1');
$dxf->addEntity($aBlock);
$dxf->saveAs('tempfiles/dxfighter.dxf');

My CAD tool fails to open the generated DXF and it seems that, unless I am mistaken, the block definition is in the ENTITIES section rather than BLOCKS.
Thanks in advance.