DeferredCredentialResponse
transaction_idstringrequired
Example: 
tx-id-sampleintervalnumberrequired
Example: 
3600DeferredCredentialResponse
{
  "transaction_id": "tx-id-sample",
  "interval": 3600
}
tx-id-sample3600{
  "transaction_id": "tx-id-sample",
  "interval": 3600
}