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{  "https://purl.imsglobal.org/spec/lti/claim/message_type": "LtiResourceLinkRequest",
  "locale": "en",
  "https://www.instructure.com/canvas_user_id": 1,
  "https://www.instructure.com/canvas_user_login_id": "showell@school.edu",
  "https://purl.imsglobal.org/spec/lti/claim/custom": {    "message_locale": "en",    "person_address_timezone": "America/Denver"  }}