post with invalid json string
POST https://buluo-api.local/test
Content-Type: application/json
{"id":"1", "name":"koogua", aa}
$json = $this->request->getJsonRawBody(); // return null
/**
* Gets decoded JSON HTTP raw request body
*
* @param bool $associative
* @return array|bool|\stdClass
*/
public function getJsonRawBody($associative = false) {}
the class api return types: array|bool|\stdClass