Sent binary data example

Questions
4

This is the error I get on the audio (post) node when executing the workflow:

ERROR: 400 - {"type":"Buffer","data":[123,34,116,121,...]}

StatusCodeError: 400 - {"type":"Buffer","data":[123,34,116,121,...]}
    at new StatusCodeError (/usr/local/lib/node_modules/n8n/node_modules/request-promise-core/lib/errors.js:32:15)
    at Request.plumbing.callback (/usr/local/lib/node_modules/n8n/node_modules/request-promise-core/lib/plumbing.js:104:33)
    at Request.RP$callback [as _callback] (/usr/local/lib/node_modules/n8n/node_modules/request-promise-core/lib/plumbing.js:46:31)
    at Request.self.callback (/usr/local/lib/node_modules/n8n/node_modules/request/request.js:185:22)
    at Request.emit (events.js:310:20)
    at Request.<anonymous> (/usr/local/lib/node_modules/n8n/node_modules/request/request.js:1154:10)
    at Request.emit (events.js:310:20)
    at IncomingMessage.<anonymous> (/usr/local/lib/node_modules/n8n/node_modules/request/request.js:1076:12)
    at Object.onceWrapper (events.js:416:28)
    at IncomingMessage.emit (events.js:322:22)