This action should be used to hang up the incoming call.
The following is an example of the JSON response you would need to provide:
{
"clientActionId": "NumberMaskingId1",
"callflow": [
{
"action": "hangup"
}
]
}
Note: The Hangup action is needed only if you do not want to complete any other action. This action is not necessary if the calling user hangs up the call.