Marks a manifest import complete after it has been marked as AutoImport
ManifestID - The manifest which is to be mark as complete.
UserID - The UserID (from List Users) who is marking the manifest as complete. Optional only if the Account only has one user.
A data structure like so:
{
'result': [
{
'success': true
}
],
'generated_in': '268ms'
}
https://api.fastway.org/latest/fastlabel/markmanifestcomplete?api_key=fc02f7481690e29cc62b6f816fb8cfde