Send To Step with Rest API V2

//Update these variables
$entry_id = '1273';
$step_id  = '127';
$domain   = 'https://develop.local';
$auth_value = 'Basic replace-me-with-basic-auth-based-on-user-application-password';

// {@see https://codex.wordpress.org/HTTP_API}
$response = wp_remote_get( $domain . '/wp-json/gravityflow/v2/entries/' . $entry_id . '/workflow/steps/' . $step_id . '/send', array(
    'headers' => array(
        'Authorization' => $auth_value,
    ),
) );

if ( ! is_wp_error( $response ) ) {
    // The request went through successfully, check the response code against
    // what we're expecting
    if ( 200 == wp_remote_retrieve_response_code( $response ) ) {
        // Do something with the response
        // $body = wp_remote_retrieve_body( $response );
        // $headers = wp_remote_retrieve_headers( $response );
    } else {
        // The response code was not what we were expecting, record the message
        $error_message = wp_remote_retrieve_response_message( $response );
    }
} else {
    // There was an error making the request
    $error_message = $response->get_error_message();
}