curl --request POST \
  --url https://api.paygentic.io/v0/items \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "merchantId": "<string>",
  "name": "<string>",
  "metadata": {}
}
'

{
  "id": "<string>",
  "object": "item",
  "merchantId": "<string>",
  "name": "<string>",
  "metadata": {},
  "externalReferences": [
    {
      "id": "<string>",
      "object": "externalReference",
      "merchantId": "<string>",
      "entityType": "item",
      "entityId": "<string>",
      "provider": "<string>",
      "externalId": "<string>",
      "metadata": {},
      "isPrimary": true,
      "isDefault": true,
      "createdAt": "2023-11-07T05:31:56Z",
      "updatedAt": "2023-11-07T05:31:56Z",
      "externalLabel": "<string>"
    }
  ],
  "createdAt": "2023-11-07T05:31:56Z",
  "updatedAt": "2023-11-07T05:31:56Z"
}