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POST /token HTTP/1.1
Content-Type: application/x-www-form-urlencoded

grant_type=authorization_code
&code=12345678
&client_assertion_type=urn%3Aietf%3Aparams%3Aoauth%3Aclient-assertion-type%3Asaml2type%3Ajwt-bearer
&client_assertion=Base64UrlEncoded-SAML2-Bearer-AssertionX.Y.Z

Note "client_assertion_type" with a value "urn:ietf:params:oauth:client-assertion-type:jwt-bearer" indicates that the type of assertion used as an authentication token is "urn:ietf:params:oauth:client-assertion-type:jwt-bearer", while the "client_assertion" parameter carries the actual value of the token.

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