OptionalapplicationkeyOptionalcapability(optional) indicates the DID capability that was assigned to the chosen application. Please note that the DID needs to support the selected capability.
OptionalnumberThe phone number in E.164 format (https://en.wikipedia.org/wiki/E.164)
Indicates the application where the number(s) was assigned. If empty, the application key that is used to sign the request will be used.