External Lists, REST, and Item Creation

QQ – Has anyone here managed to create a list item in an external list using a REST call?

Post your call if you have, having issues myself with 201 success status returning a null ID.

Also feel free to give some love to the same question I found in Stack Exchange: 

http://sharepoint.stackexchange.com/questions/129790/how-to-create-list-item-in-an-external-list-using-sharepoint-workflow