An example purely for the Chorus network can be found below.

{
  "Customer": {
    "Nr": "cust_12345",
    "Name": "Tech Corp",
    "Street": "Tech Street, 15",
    "Zipcode": "00000",
    "City": "Tech City",
    "CountryCode": "IT",
    "Email": "[email protected]",
    "VATNumber": "FR1234567890",
    "PartyType": "Customer",
    "VATLiable": true,
    "VATDeductable": true,
    "Identifiers": [
      { "IdentifierType": "SIRET", "Identifier": "" },
      { "IdentifierType": "SIRENE", "Identifier": "" },
      { "IdentifierType": "ServiceCode", "Identifier": "" }
    ]
  },
  "OrderNumber": "ord_12345",
  "OrderDate": "2023-01-01",
  "ExpiryDate": "2023-01-01",
  "OrderType": "Invoice",
  "OrderDirection": "Income",
  "OrderLines": [
    {
      "Quantity": 1.0,
      "UnitPriceExcl": 1.67,
      "Description": "Fee to pay",
      "VATPercentage": 22.0,
    }
  ],
  "Paid": true/false,
  "Currency": "EUR",
}

The identifiers part is a crucial part of successful delivery of the E-invoice on the SDI network. More of them can be found here -> https://docs.accesspoint.billit.eu/docs/identifiers