ORDS, SODA & JSON in the Database

hi to everyone!

I'm facing a problem with sending JSON over the ORDS.

I'm sending body payload in structure as shown:

{
    "DOCUMENT":{
        "CREATED_BY":"test",
        "SHORT_NOTE":"Test document",
        "FILENAME":"test.jpeg",
        "FILETYPE":"application/jpeg",
        "BASE64_DOC":"around 80k base64 encoded string",
    }
}

And I have a problem with BASE64_DOC because it has a large value. For now, I found out that if I send BASE64_DOC in 4k length it works fine.

Does anyone know what is a problem and how I can send value which is larger than 4k over ORDS?

We are using:

Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production

PL/SQL Release 12.2.0.1.0 - Production

"CORE    12.2.0.1.0    Production"

TNS for Linux: Version 12.2.0.1.0 - Production

NLSRTL Version 12.2.0.1.0 - Production

ORDS v18.4

Any help would be appreciated!

Best regards to everyone

Dragan