Authorization: Bearer ********************curl --location --request POST '/kling/v1/general/custom-voices' \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data-raw '{
"voice_name": "string",
"voice_url": "string",
"video_id": "string",
"callback_url": "string",
"external_task_id": "string"
}'{\r\n \"voice_name\": \"test voice\",\r\n \"voice_url\": \"\",\r\n \"video_id\": \"830460928805724256\",\r\n \"callback_url\": \"\",\r\n \"external_task_id\": \"\"\r\n}