Initiate a phone call

curl --request POST \
  --url https://api.outrival.com/rest/v2/call/phone \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '{
  "workflowId": "<string>",
  "deploymentId": "<string>",
  "phoneNumber": "<string>",
  "userName": "<string>",
  "userId": "<string>",
  "variables": {},
  "metadata": {},
  "externalId": "<string>",
  "anonymousId": "<string>"
}'

{
  "id": "<string>"
}