curl --request POST 'https://api.voicecheap.ai/v1/actions/thumbnails_upload_complete' \
  --header "x-api-key: $VOICECHEAP_API_KEY" \
  --header 'Content-Type: application/json' \
  --data '{"requestId":"ef5fe21c-c80c-4b96-b2ed-8d37bf2c667a","uploadId":"c547fb7f-f334-46a8-a8bb-80b5b343889a","parts":[{"partNumber":1,"etag":"\"d41d8cd98f00b204e9800998ecf8427e\""},{"partNumber":2,"etag":"\"0cc175b9c0f1b6a831c399e269772661\""}]}'

const input = {
  requestId: 'ef5fe21c-c80c-4b96-b2ed-8d37bf2c667a',
  uploadId: 'c547fb7f-f334-46a8-a8bb-80b5b343889a',
  parts: [
    {
      partNumber: 1,
      etag: '"d41d8cd98f00b204e9800998ecf8427e"',
    },
    {
      partNumber: 2,
      etag: '"0cc175b9c0f1b6a831c399e269772661"',
    },
  ],
};
const response = await fetch('https://api.voicecheap.ai/v1/actions/thumbnails_upload_complete', {
  method: 'POST',
  headers: {
    'x-api-key': process.env.VOICECHEAP_API_KEY,
    'Content-Type': 'application/json',
  },
  body: JSON.stringify(input),
});
const body = await response.json();
if (!response.ok) throw new Error(body.code + ': ' + body.message);
console.log(body);

import os
import requests

response = requests.post(
    "https://api.voicecheap.ai/v1/actions/thumbnails_upload_complete",
    headers={"x-api-key": os.environ["VOICECHEAP_API_KEY"]},
    json={"requestId": "ef5fe21c-c80c-4b96-b2ed-8d37bf2c667a", "uploadId": "c547fb7f-f334-46a8-a8bb-80b5b343889a", "parts": [{"partNumber": 1, "etag": "\"d41d8cd98f00b204e9800998ecf8427e\""}, {"partNumber": 2, "etag": "\"0cc175b9c0f1b6a831c399e269772661\""}]},
    timeout=120,
)
body = response.json()
if not response.ok:
    raise RuntimeError(f"{body.get('code')}: {body.get('message')}")
print(body)

{
  "data": {
    "fileKey": "uploads/example-user/2502829e-3fde-4aad-b3c7-ce0f779fa2e6-reference.png",
    "readUrl": "https://media.example.com/uploads/example-user/2502829e-3fde-4aad-b3c7-ce0f779fa2e6-reference.png"
  },
  "requestId": "ef5fe21c-c80c-4b96-b2ed-8d37bf2c667a"
}

{
  "data": {
    "requestId": "ef5fe21c-c80c-4b96-b2ed-8d37bf2c667a",
    "operation": "thumbnails_upload_complete",
    "createdAt": 1792144800000,
    "updatedAt": 1792144820000,
    "status": "running",
    "pollAfterSeconds": 5
  },
  "requestId": "ef5fe21c-c80c-4b96-b2ed-8d37bf2c667a"
}

{
  "data": {
    "requestId": "ef5fe21c-c80c-4b96-b2ed-8d37bf2c667a",
    "operation": "thumbnails_upload_complete",
    "createdAt": 1792144800000,
    "updatedAt": 1792144820000,
    "status": "completed",
    "resultStored": false,
    "message": "The action completed. Retrieve its output from the corresponding history or resource action."
  },
  "requestId": "ef5fe21c-c80c-4b96-b2ed-8d37bf2c667a"
}