curl --location --request GET '/api/v2/voices/1'
{
"id": 1,
"name": "Echo",
"tenant_id": null,
"is_public": true,
"created_at": "2025-07-10T12:24:57.125601+00:00",
"file_url": null,
"file_size": null,
"content_type": "audio/wav",
"duration": null,
"file_size_mb": 0.0,
"duration_formatted": "00:00"
}