Insert Custom Post Type through PostMan

Hello,

The documentation states I should send Post Meta as an array, I have been trying to send data with Chromes Postman application, but keep getting errors every time.

Every time I get “Missing meta key”.

I have tried :

Key = post_meta[myKey]
Value = myPostMetaVal

I am also authenticated, and can create new posts without a problem.

Can someone please give me a better explanation of how to do this?

Thanks

https://ww.wp.xz.cn/plugins/json-rest-api/