[FIG(quote)[
[FIGCAPTION[
[1] [CITE[LINE Developers - BusinessConnect - Developing BusinessConnect server]]
([TIME[2015-07-01 00:48:32 +09:00]] 版)
<https://developers.line.me/businessconnect/development-bot-server>
]FIGCAPTION]

> 
> 470	Unable to process the contents of the received request.	Will not retry

]FIG]