Create application API not working when include file in base64 encoded

Hello there,

I follow the documents for create application https://docs.join.com/reference/createapplication
and then I tried to create an application via https://api.join.com/v1/applications in the POST method

If pass parameter "documents" with pdf in base64 encoded document the API returns 500 error with this

{
"error": {
"type": "Unknown",
"message": "Something went wrong"
}
}

I tried to send the data with a pdf size is 76 KB, but the API returned a 500 error and I tried to send a small pdf size is 7KB, it's working.

I guess it's a problem with the post max size from the API server.

Thank you