code: public function addMediaToDeploymentSite($id, array $mediaIds)
      {
          $parameters = [
              'query' => [],
              'body' => json_encode(['mediaIds' => $mediaIds], JSON_UNESCAPED_UNICODE),
              'headers' => [],
          ];
  
          $result = $this->post('v1/deployment/' . $id . '/media', $parameters);
  
          return $result;
      }
docs: Deploy Media to a DeploymentSite.
  
  Deploy Media to a DeploymentSite, this is an asynchronous method.
  
  @param int   $id       deploymentSite to deploy to
  @param int[] $mediaIds an array of int values