push-device is required unless push-network is pwa.{
"push-device": "sip:1001a@example.com",
"push-device-token": "a1b2c3d4e5f60718293a4b5c6d7e8f90a1b2c3d4e5f60718293a4b5c6d7e8f90",
"push-network": "apns",
"domain": "example.com",
"user": "1001"
}