$boldNumberRequest = $this->BoldNumberRequest->newEntity();
$boldNumberRequest = $this->BoldNumberRequest->patchEntity($boldNumberRequest, $this->request->data);
$this->BoldNumberRequest->saveMany($boldNumberRequest)

(int) 0 => [
    'bold_number_from' => '1',
    'bold_number_to' => '1000',
    'is_approved' => '1',
    'unique_series' => '030318',
    'owner_company_id' => '1'
],
(int) 1 => [
    'bold_number_from' => '1',
    'bold_number_to' => '1000',
    'is_approved' => '1',
    'unique_series' => '100318',
    'owner_company_id' => '1'
],