Deal with Gutenberg table block via API

Hi, i have an issue when i post a Gutenberg block of type table by using the rest API.

I sent this block via API

<figure class="wp-block-table aligncenter">

<table>

<thead>

<tr>

<th style="text-align:left">Città</th>

<th style="text-align:right">Popolazione</th>

<th style="text-align:center">Cool factor</th>

</tr>

</thead>

<tbody>

<tr>

<td style="text-align:left">Sant’Arpino</td>

<td style="text-align:right">18000</td>

<td style="text-align:center">Frenz</td>

</tr>

<tr>

<td style="text-align:left">Succivo</td>

<td style="text-align:right">9000</td>

<td style="text-align:center">Clenz</td>

</tr>

<tr>

<td style="text-align:left">Gricignano</td>

<td style="text-align:right">13000</td>

<td style="text-align:center">Fuckens</td>

</tr>

<tr>

<td style="text-align:left">Pomigliano</td>

<td style="text-align:right">28000</td>

<td style="text-align:center">Brackens</td>

</tr>

</tbody>

</table>

</figure>

When i open the post in edit for the table block WP is reporting that there is a corrupted or unexpected format:

is there something wrong in the block syntax?