curl --request POST \
  --url https://api.landing.ai/v1/projects/{project_id}/autosplit \
  --header 'Content-Type: application/json' \
  --data '
{
  "splitPercentages": {
    "train": 123,
    "dev": 123,
    "test": 123
  }
}
'

import requests

url = "https://api.landing.ai/v1/projects/{project_id}/autosplit"

payload = { "splitPercentages": {
        "train": 123,
        "dev": 123,
        "test": 123
    } }
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({splitPercentages: {train: 123, dev: 123, test: 123}})
};

fetch('https://api.landing.ai/v1/projects/{project_id}/autosplit', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>"
    }
  ]
}