Convert C# function to Elixir

Questions & Help Questions
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1

this is the function that I am trying to convert to Elixir:

private static byte[] HashBody(string content)
   {
       var contentBytes = Encoding.UTF8.GetBytes(content);

       using (var provider = new SHA256Managed())
       {
          var hash = provider.ComputeHash(contentBytes);
          return hash;
        }
    }

My attempt:

content = %{
  "id" => "123",
  "name" => "Jaqob"
} |> Poison.encode!

digest = :crypto.hash(:sha256, content)

I want to convert content variable to bytes which is where I am stuck, also is the hashing function correct?