originationIdentity

The origination identity to use such as a PhoneNumberId, PhoneNumberArn, SenderId or SenderIdArn. You can use DescribePhoneNumbers find the values for PhoneNumberId and PhoneNumberArn, or use DescribeSenderIds to get the values for SenderId and SenderIdArn.

If you are using a shared AWS End User Messaging SMS and Voice resource then you must use the full Amazon Resource Name(ARN).