feature.php

<?php

class ApiContext
{
  //...
  /**
     * Sends a request with a body and token
     * This function is used to pass an array in the JSON. If your data is only simple values, prefer sendRequestWithTokenAndValues
     *
     * @Given /^I sent a post request (?:on|to) "(?P<url>(?:[^"]|\\")*)" with my token and this body :$/
     * @When /^I send a post request (?:on|to) "(?P<url>(?:[^"]|\\")*)" with my token and this body :$/
     *
     * @param string $method      a valid HTTP method
     * @param string $url         URL to send the request
     * @param string|PyStringNode Content to send
     */
    public function sendRequestWithTokenAndBody($method, $url,$body) {
        $this->getMainContext()->sendRequestWithBody($method, $this->getToken($url), $body); // getToken, ou je sais plus ce que c'est
    }
    
    //...
}

gistfile1.feature

Scenario: Try to post a wrong role
  Given I have a token with these identifiers :
    | email             | secret | app_id      | hash                                     |
    | [email protected] | pass   | my_aid_test | 9bac74d1a36021be7eb9246e3c4976879b571ba2 |
  When I send a post request on "/api/3/event/behatOther/invitations" with my token and this body :
    """
    {"emails":[{"email":"[email protected]", "role":"66"}]}
    """
  Then the JSON key "error[code]" should be equal to "wrong_rigths"
    And the response status code should be 403