curl --request PUT \
  --url https://ywe3crmpll.execute-api.us-east-2.amazonaws.com/stage/purchase-orders/{id} \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "vendor_type": "",
  "vendor_id": "",
  "vendor_name": "",
  "tax_rate": "",
  "title": "",
  "status": "",
  "payment_status": "",
  "comment": "",
  "order_at": "",
  "expected_delivery_at": "",
  "received_at": "",
  "customer_id": "",
  "job_id": "",
  "project_id": "",
  "invoice_id": "",
  "assigned_id": "",
  "order_email": "",
  "delivery_method": "",
  "delivery_address": "",
  "delivery_flat": "",
  "delivery_city": "",
  "delivery_state": "",
  "delivery_postcode": "",
  "delivery_instruction": "",
  "pickup_branch_id": "",
  "order_number": "",
  "order_phone": "",
  "items": [
    {
      "id": "",
      "item_id": "",
      "title": "",
      "type": "",
      "unit_measure": "",
      "unit_cost": "",
      "is_taxed": "",
      "tax_rate": "",
      "quantity": "",
      "payment_status": ""
    }
  ]
}
'

import requests

url = "https://ywe3crmpll.execute-api.us-east-2.amazonaws.com/stage/purchase-orders/{id}"

payload = {
    "vendor_type": "",
    "vendor_id": "",
    "vendor_name": "",
    "tax_rate": "",
    "title": "",
    "status": "",
    "payment_status": "",
    "comment": "",
    "order_at": "",
    "expected_delivery_at": "",
    "received_at": "",
    "customer_id": "",
    "job_id": "",
    "project_id": "",
    "invoice_id": "",
    "assigned_id": "",
    "order_email": "",
    "delivery_method": "",
    "delivery_address": "",
    "delivery_flat": "",
    "delivery_city": "",
    "delivery_state": "",
    "delivery_postcode": "",
    "delivery_instruction": "",
    "pickup_branch_id": "",
    "order_number": "",
    "order_phone": "",
    "items": [
        {
            "id": "",
            "item_id": "",
            "title": "",
            "type": "",
            "unit_measure": "",
            "unit_cost": "",
            "is_taxed": "",
            "tax_rate": "",
            "quantity": "",
            "payment_status": ""
        }
    ]
}
headers = {
    "x-api-key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PUT',
  headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    vendor_type: '',
    vendor_id: '',
    vendor_name: '',
    tax_rate: '',
    title: '',
    status: '',
    payment_status: '',
    comment: '',
    order_at: '',
    expected_delivery_at: '',
    received_at: '',
    customer_id: '',
    job_id: '',
    project_id: '',
    invoice_id: '',
    assigned_id: '',
    order_email: '',
    delivery_method: '',
    delivery_address: '',
    delivery_flat: '',
    delivery_city: '',
    delivery_state: '',
    delivery_postcode: '',
    delivery_instruction: '',
    pickup_branch_id: '',
    order_number: '',
    order_phone: '',
    items: [
      {
        id: '',
        item_id: '',
        title: '',
        type: '',
        unit_measure: '',
        unit_cost: '',
        is_taxed: '',
        tax_rate: '',
        quantity: '',
        payment_status: ''
      }
    ]
  })
};

fetch('https://ywe3crmpll.execute-api.us-east-2.amazonaws.com/stage/purchase-orders/{id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "error": true,
  "errors": [
    "error message",
    "error message"
  ]
}

{
  "message": "Unauthorized"
}

{
  "message": "Request URL or object not found"
}

{
  "message": "Internal Server Error"
}