WeightedMessage

Field	Type	Required	Description
title	string	yes
body	string	yes
image	`string	null`
imageType	string		one of: custom, externalUrl, product
shared	number		default: 1

Example

{
  "title": "TheTitle",
  "body": "BodyBodyBody",
  "image": "http://url",
  "imageType": "custom",
  "shared": 1
}