||The event type, value is
||Direction of message:
in - a message that came from the telephone network to one of your numbers (an “inbound” message)
out - a message that was sent from one of your numbers to the telephone network (an “outbound” message)
||The message sender’s telephone number (or short code).
||Message recipient telephone number (or short code).
||The unique id of the message resource for this event.
||The full URL of the message resource.
||The message contents.
||The time the message resource was created (UTC, follows the ISO 8601 format).
||Message state, values are