Generate Function To Create Signed_Body For Instagram

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Project Budget (USD)
$30 - $250

Project Description:
I need the exact same as in this Freelancer project:
The only difference is that I need the most recent version. Things have changed a little since then (the key has), so I need this done freshly.
I need the result in C#, sourcecode needs to be given as well.

Skills required:
.NET, Android, C# Programming, C++ Programming, Mobile Phone
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