Unable to POST image file using the REST client

Hello,

I have been for a long time on this problem without any luck.....

I am trying to POST an image using the REST Client but I keep receiving the error "Your uploaded file must be an image in .jpg format.

From what I can see, the REST client is not sending my image correctly to the API.

Any idea where I have the wrongly the parameters please?

In the header I have also tried:

Content-Type: image/jpeg

No luck, same error.

Please help, I am completely stuck.

Thank you.