{"iss"=>"what is an audience?", "login_hint"=>"1779192", "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.eyJ0b29sX2lkIjoyNzIxLCJzdGF0ZV9ub25jZSI6IjNkMDMyNGM5ZTIxYjNkZmIwMmZkIiwicGFyYW1zIjp7ImlzcyI6IndoYXQgaXMgYW4gYXVkaWVuY2U_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.CSye9MX5kezOOtdq-XcuAQlXhzh8TIXIjEJEM-HLJamyUrPCkPVf53j0f9V_ypv1jQh5GSopEkl41WTETgleRGXUgWbFYIFWrSdYUtdoXjVYRaD-hEvw5IX1EpL52ZBw_34bCzgkJDNVJ0-VhcCUeX-UoZjAT1Kq35_VhWbe_uMxQsdwijPCP-TSCCk710AUpVUnkuY_wNlfZFZlNhAKXh_btFBgm3zlubXbi_qyHSA-RHW9ONBANySa77Nx172tnu0RI-GvUy1qDEKfxcqKzoUZjfzCGjvlCb6ETZU5KjpWIvUoNbXPfXAuu4tqMdprE_cYPwAAhLtEhSdzRy4KaQ (required, opaque value used to maintain state between the request and the callback)

login_hint: 1779192 (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: 3d0324c9e21b3dfb02fd (optional, string value used to associate a client session with an ID token, and to mitigate replay attacks)

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