url: 'https://some.example.com/twiml.xml' #url twiml applicationSidは、いずれか1つのみを指定してください
twiml: "<Response><Say>Hi!</Say></Response>"
applicationSid: 'hogehoge'
# toFormatted: '+819012345678',
# fromFormatted: '(858) 943-3624',
# phoneNumberSid: 'PN8aab3d5406172b5a0e1ab038195a63b7',
# direction: 'outbound-api',
# apiVersion: '2010-04-01',
# uri: '/2010-04-01/Accounts/AC422b83445f09009f3e6a7c54ec07411c/Calls/CA547e20c68562d49f71adba948b3e8d9e.json',
# notifications: '/2010-04-01/Accounts/AC422b83445f09009f3e6a7c54ec07411c/Calls/CA547e20c68562d49f71adba948b3e8d9e/Notifications.json',
# recordings: '/2010-04-01/Accounts/AC422b83445f09009f3e6a7c54ec07411c/Calls/CA547e20c68562d49f71adba948b3e8d9e/Recordings.json',
# feedback: '/2010-04-01/Accounts/AC422b83445f09009f3e6a7c54ec07411c/Calls/CA547e20c68562d49f71adba948b3e8d9e/Feedback.json',
# payments: '/2010-04-01/Accounts/AC422b83445f09009f3e6a7c54ec07411c/Calls/CA547e20c68562d49f71adba948b3e8d9e/Payments.json',
# feedback_summaries: '/2010-04-01/Accounts/AC422b83445f09009f3e6a7c54ec07411c/Calls/FeedbackSummary.json'