{
"success": true,
"message": "Phone number assigned successfully",
"agent": {
"agent_id": "agent_123",
"assigned_phone_number_ids": ["pn_456"]
// ...
},
"phone_number": {
"phone_number_id": "pn_456",
"status": "assigned",
"assigned_agent_id": "agent_123"
// ...
}
}