curl --request POST \
  --url https://api.upon-ai.com/api/calls/web \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "agentId": "<string>",
  "workspaceId": 123,
  "agentVersion": 123,
  "metadata": {},
  "uponai_dynamic_variables": {}
}
'

{
  "callId": "<string>",
  "callType": "<string>",
  "status": "<string>",
  "agentId": "<string>",
  "agentVersion": 123,
  "metadata": {},
  "optOutSensitiveDataStorage": true,
  "accessToken": "<string>",
  "expiresAt": "2023-11-07T05:31:56Z",
  "webCallUrl": "<string>",
  "uponai_dynamic_variables": {}
}