Convert document to base64 string

Certified Senior Developer

Hi all,

We need to send a document from appian to an external system which receives document as a part of json with document converted into base64 string. 
For example:
{

"name":"Document_name",

"document":"base64 string encoded document"
}

The request json will look something like this. How to convert document into base64 string in appian? Do we have any plugins for that??

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