413 Error: request entity too large

Hi,
When I try to do a POST with base64 image I got this error:
```
Request Method:	
POST	
Status Code:	
413 Payload Too Large	
Remote Address:	
127.0.0.1:8080
Referrer Policy:
no-referrer-when-downgrade
```
```
PayloadTooLargeError: request entity too large
```

Please, can you tell me how to increase the payload's limit?  

Thank you 

Andrea