This is more like a challenge/hobby task.
A site request doesnt specify any encoding with a mimeType of 'application/octet-stream', and the request data is something like this for example:
That example data corresponds to a coordinate point (lat, lng), approximately (most likely exactly) to be this one:
I need to know the encoding so I can do the reverse of picking any coordinate point and generate the request data.
(I will provide the site url on request)