MessageType (delivery launch)
This parameter is used to define each type of entity you are linking in the configuration. Entering the message type for each entity defined in the request is required by the LTI tool.
For more information, see Message Type claim in https://www.imsglobal.org/spec/lti/v1p3#message-type-claim.
Example:
CODE
"https://purl.imsglobal.org/spec/lti/claim/message_type": "LtiResourceLinkRequest"