curl --request POST \
--url https://api.callhq.ai/api/calls/outbound \
--header 'Content-Type: application/json' \
--header 'x-api-key: <api-key>' \
--data '{
"assistantId": "<string>",
"phoneNumberId": "<string>",
"customer": {
"number": "+919876543210",
"name": "<string>"
}
}'