{"iss"=>"what is an audience?", "login_hint"=>"1085636", "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.eyJ0b29sX2lkIjoyNzIxLCJzdGF0ZV9ub25jZSI6IjNjNTcwMDAyZWRhNDZjMDU0OGExIiwicGFyYW1zIjp7ImlzcyI6IndoYXQgaXMgYW4gYXVkaWVuY2U_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.NmU6Eo24e3lzoE50ytbJ-MijA2k4cXhlBf4mzDBE_YAd9WkBtMnuZiKyN18W9E5lN-2v_6JWLyBV9x262a2Ii7WU3Ocv5c2lq8stqR-VISHNET1rckbVQ92xLvF0UeGtW5SKY2s1_93zAPiL3oClW0LGiumoeeeFnSoqt6UE9aDpSnozyH8DARs3rlqar6KwbWO2Oua5Shatb0GSYbI9oFLv62p359K3YZp_VGfBJAw1ZusmBYwfK9zCI2seRVEzNYwhA0BFVXA9QaV_AwTpaLvgMD_O4ic0Y2bSeIQo_H_31XTsIj2PzJGcQpBFvrwz9Uoxms7PcdaW6h-cPUf2Iw (required, opaque value used to maintain state between the request and the callback)

login_hint: 1085636 (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: 3c570002eda46c0548a1 (optional, string value used to associate a client session with an ID token, and to mitigate replay attacks)

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