According to our documentation, the method is required too
https://developer.bitmovin.com/encoding/reference/postencodingencodingsmuxingsfmp4drmaesbyencodingidandmuxingid
Example :
{
Outputs = new List() { BuildEncodingOutput(output, outputPath) },
Key = “770A8A65DA156D24EE2A093277530142”,
Iv = “F5502320F8429037B8DAEF761B189D12”,
Name = “AESKey”,
Description = “AES Key Generator”,
method: “SAMPLE_AES”
};