Set voice url
POST http://localhost:{{PROXY}}8118/v3/accounts/{{ACCOUNT_SID}}/inventory/PNxxx
Request Body
[{"name"=>"voice_url", "value"=>"https://webhooks.stage.twilio.com/v1/Accounts/ACxxx/Flows/FWxxx", "datatype"=>"string"}]
POST http://localhost:{{PROXY}}8118/v3/accounts/{{ACCOUNT_SID}}/inventory/PNxxx
[{"name"=>"voice_url", "value"=>"https://webhooks.stage.twilio.com/v1/Accounts/ACxxx/Flows/FWxxx", "datatype"=>"string"}]