curl --request POST \
  --url https://api.aichs365.com/api/v1/dh_train_query_batch \
  --header 'Content-Type: application/json' \
  --header 'X-Legacy-Token: <api-key>' \
  --data '
{
  "model_ids": [
    "<unknown>"
  ]
}
'

const options = {
  method: 'POST',
  headers: {'X-Legacy-Token': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({model_ids: ['<unknown>']})
};

fetch('https://api.aichs365.com/api/v1/dh_train_query_batch', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.aichs365.com/api/v1/dh_train_query_batch"

payload = { "model_ids": ["<unknown>"] }
headers = {
    "X-Legacy-Token": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)