How to consume e-social webservice with php

Hello, I'm challenged to make a system communicate with e-social webservice using php with laravel framework, but I have no clue how to proceed. The system is used to register employees.

I made the following test with the php SoapClient class, to get a sense of how the request was being mounted:

$this->options = [
      'location' => 'https://webservices.producaorestrita.esocial.gov.br/servicos/empregador/enviarloteeventos/WsEnviarLoteEventos.svc',
      'cache_wsdl' => WSDL_CACHE_NONE,
      'exceptions' => false,
      'trace' => true,
      'local_cert' => '\teste\teste.pem',
  ];

  $this->wsdl = 'C:\Users\alexs\Desktop\WsEnviarLoteEventos.wsdl';

  $this->params = [
                    'nome' => 'Alex', 
                    'idade' => '18',
                    'subatributos' =>[
                      'item1' => 'value1',
                      'item2' => 'value2',
                      'item3' => 'value3',
                    ],
                  ];

  $this->function = "EnviarLoteEventos";


  $this->client = new SoapClient($this->wsdl, $this->options);

  $response = $this->client->SoapCall($this->function, $this->params);

  return $this->client->getLastRequest();

I get the following return:

<soap-env:envelope xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns1="http://www.esocial.gov.br/servicos/empregador/lote/eventos/envio/v1_0_0">
<soap-env:body>
    <ns1:enviarloteeventos>
        <param1>18</param1>
        <param2>
            <item>
                <key>item1</key>
                <value>value1</value>
            </item>
            <item>
                <key>item2</key>
                <value>value2</value>
            </item>
            <item>
                <key>item3</key>
                <value>value3</value>
            </item>
        </param2>
    </ns1:enviarloteeventos>
</soap-env:body></soap-env:envelope>

In the e-social developer guidance manual says that requests should be submitted in this format:

<eSocial xmlns="http://www.esocial.gov.br/schema/evt">

    <!-- Xml do Evento -->

    <Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
        <.../>
    </Signature>
</eSocial> 

One of my doubts is whether to mount the event XML before and pass as parameter to the SoapCall method, or should I leave it as is? I'm not sure what I did is right.

If you can give me a north I thank you because I'm a bit lost. I've never worked with Soap before.