OptionalapplicationkeyOptionalcapabilityindicates the DID capability that needs to be assigned to the chosen application. Valid values are 'voice' and 'sms'. Please note that the DID needs to support the selected capability.
OptionalnumberNumbers that you own in E.164 format.
Indicates the application where the number(s) will be assigned. If no number is assigned the applicationkey will not be returned.