Data Insert

Send POST on URL:
?SERVICE=WFS&VERSION=1.0.0&SRSNAME=EPSG:3003&
<Transaction
  xmlns="http://www.opengis.net/wfs"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  version="1.0.0"
  service="WFS"
  xmlns:p5_default_db="https://biuro.biall-net.pl/wfs/default_db"
  xmlns:gml="http://www.opengis.net/gml">
  <Insert xmlns="http://www.opengis.net/wfs">
    <TEST_PERMS xmlns="https://biuro.biall-net.pl/wfs/default_db/TEST_PERMS">
      <OPIS xmlns="https://biuro.biall-net.pl/wfs/default_db/TEST_PERMS">test</OPIS>
      <the_geom xmlns="https://biuro.biall-net.pl/wfs/default_db/TEST_PERMS">
        <gml:Polygon srsName="EPSG:4326">
          <gml:outerBoundaryIs>
            <gml:LinearRing>
                <gml:coordinates cs="," ts=" ">18.44569262058692871,54.36867274376898251 18.44884659456100096,54.35193242036815064 18.48208462798003637,54.34368356535905065 18.44569262058692871,54.36867274376898251</gml:coordinates>
            </gml:LinearRing>
          </gml:outerBoundaryIs>
        </gml:Polygon>
      </the_geom>
    </TEST_PERMS>
  </Insert>
</Transaction>
If together would be sent element with ID (primary key) than would be made UPDATE transaction. Example:
<ID xmlns="https://biuro.biall-net.pl/wfs/default_db">24</ID>
<Transaction
  xmlns="http://www.opengis.net/wfs"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  version="1.0.0"
  service="WFS"
  xmlns:p5_default_db="https://biuro.biall-net.pl/wfs/default_db"
  xmlns:gml="http://www.opengis.net/gml">
  <Insert xmlns="http://www.opengis.net/wfs">
    <TEST_PERMS xmlns="https://biuro.biall-net.pl/wfs/default_db/TEST_PERMS">
      <ID xmlns="https://biuro.biall-net.pl/wfs/default_db/TEST_PERMS">24</ID>
      <OPIS xmlns="https://biuro.biall-net.pl/wfs/default_db/TEST_PERMS">test</OPIS>
      <the_geom xmlns="https://biuro.biall-net.pl/wfs/default_db/TEST_PERMS">
        <gml:Polygon srsName="EPSG:4326">
          <gml:outerBoundaryIs>
            <gml:LinearRing>
                <gml:coordinates cs="," ts=" ">18.44569262058692871,54.36867274376898251 18.44884659456100096,54.35193242036815064 18.48208462798003637,54.34368356535905065 18.44569262058692871,54.36867274376898251</gml:coordinates>
            </gml:LinearRing>
          </gml:outerBoundaryIs>
        </gml:Polygon>
      </the_geom>
    </TEST_PERMS>
  </Insert>
</Transaction>