Power automate: “send an http request to Sharepoint” token error

Question

I'm trying to use a Flow to create news links in a modern site when a new post is published to an external site's rss feed.

It appears to get the JSON content correctly but the "send an http request to SP" action fails with this error:

{"odata.error":{"code":"-1, 
Microsoft.SharePoint.Client.InvalidClientQueryException","message": 
{"lang":"en-US","value":"An entry without a type name was found, but no 
expected type was specified. To allow entries without type information, the 
expected type must also be specified when the model is specified."}}}
clientRequestId: 94e00dab-0fa0-42ff-bad5-1a01977e36b4
serviceRequestId: ee528d9f-9037-b000-a5d6-4561d64500a1

Answer 1

In the body of the "send an http request to SP" action, I notice that there is only one underscore in front of metadata. It should be two, like this: "__metadata":{"type":"SP.Publishing.RepostPage"}.