{"iss"=>"what is an audience?", "login_hint"=>"784353", "target_link_uri"=>"https://lti-ri.imsglobal.org/lti/tools/2721/launches", "lti_message_hint"=>"69072", "client_id"=>"just a tribute", "lti_deployment_id"=>"a long lonesome road"}

response_type: id_token (required, the tool must use a value of id_token)

redirect_uri: https://lti-ri.imsglobal.org/lti/tools/2721/launches (required, This URI must exactly match a value pre-registered with the platform)

response_mode: form_post (required, tools and platforms must support a value of form_post)

client_id: just a tribute (required, client identifier valid at the Platform)

scope: openid (required, must contain the openid scope value)

state: eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6ImY4YkQtUElGNm9FQmlueVBGSnRVT0k0d3VTbXBQU1VaWXV0Z01fV3FEUEkiLCJ0eXAiOiJKV1QifQ.eyJ0b29sX2lkIjoyNzIxLCJzdGF0ZV9ub25jZSI6IjRlNGE3OWY5MDAzMjhlYWNjNGNlIiwicGFyYW1zIjp7ImlzcyI6IndoYXQgaXMgYW4gYXVkaWVuY2U_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.W36ZT6EjP6-7aI-lgFVrMUccjFbZZQO7K2l14XkzrgIymkzpmJ2r_GXR6-xDAowXz01A1pykOZLgtAJAN3lxJuE2ALZLtzi-TxpmwIuudxuSscM0baNd3uEV4JEBXKfRKkH6ROwyPavBb9TBYyxe20E9hDqXCXodIyMx7lVRQllz6G8Ad_QVB03BemHwJjJEOBKxiMeKSLZ3XXVO60ekE6CH1pAKp-ycpH_iD7GHKUG_K3V9U1BZ8oBPmJI8fGz_cW9gliX2CgE1jEP7m-WKLbx0FbV8n9rNXl1zRux2D_g2TArfQMmB6kMfgkNljTjW7igf334EehNBwr3e_wy_vg (required, opaque value used to maintain state between the request and the callback)

login_hint: 784353 (required, tools and platforms must support a value of form_post)

lti_message_hint: 69072 (required, a platform opaque identifier identifying the user to login)

prompt: none (optional, The tool should use a value of none. In the future a re-launch flow may support additional values being used here)

nonce: 4e4a79f900328eacc4ce (optional, string value used to associate a client session with an ID token, and to mitigate replay attacks)

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