json definition with remarks:

{
    "publicSalt": "",
    "publicSignature": "",
    "integritySignature": "",
    "uid": "",
    "iaprSignPolicy": 2,
    "uniqueId": "",
    "authenticationCode": "",
    "currencyCode": "EUR",
    "invoiceTypeCode": "5.2",
    "specialInvoiceCategory": 0,
    "variationType": 0,
    "documentType": "ΠΙΣΤΩΤΙΚΟ ΑΞΙΑΚΟ ΤΙΜΟΛΟΓΙΟ",
    "documentTypeCode": "ELB2G",
    "isDeliveryNote": false,
    "OrderNumber": "",
    "DistributionDetails.DeliveryDestinationDetails.Address.GLN": "",
    "series": "K",
    "number": "0000037",
    "dateIssued": "2024-10-21T05:20:42",
    "relativeDocuments": [],
    "issuer": {
        "registeredName": "issuer's name",
        "vat": "EL118058830",
        "taxOffice": "ΙΒ ΑΘΗΝΩΝ",
        "activities": [
            "ΦΑΡΜΑΚΕΥΤΙΚΗ ΕΤΑΙΡΕΙΑ Ε.Π.Ε"
        ],
        "phones": [
            "0000000"
        ],
        "faxes": [
            "0000000"
        ],
        "emails": [
            ""
        ],
        "address": {
            "country": "Ελλάδα",
            "countryCode": "GR",
            "city": "issuer's city",
            "street": "issuer's street",
            "postal": "11528"
        },
        "posId": "0"
    },
    "counterParty": {
        "registeredName": "ΓΕΝ. ΝΟΣ. ΘΕΣ/ΚΗΣ ΙΠΠΟΚΡΑΤΕΙΟ",
        "vat": "EL999432325",
        "taxOffice": "ΣΤ ΘΕΣ/ΝΙΚ",
        "activities": [
            "ΠΕΛΑΤΕΣ ΔΗΜ ΤΟΜΕΑ"
        ],
        "phones": [
            "0000000"
        ],
        "address": {
            "countryCode": "GR",
            "city": "counter party's city",
            "street": "counter party's street",
            "postal": "54642"
        },
        "code": "0007718005"
    },
    "recipient": {
        "registeredName": "ΓΕΝ. ΝΟΣ. ΘΕΣ/ΚΗΣ ΙΠΠΟΚΡΑΤΕΙΟ",
        "vat": "EL999432325",
        "address": {
            "countryCode": "GR",
            "city": "Recipient's city",
            "street": "Recipient's street",
            "postal": "54642"
        }
    },
    "allowancesCharges": [],
    "distributionDetails": {
        "internalDocumentId": "1620000064"
    },
    "paymentDetails": {
        "paymentMethods": [
            {
                "paymentMethodType": "ΠΙΣΤΩΣΗ",
                "paymentMethodTypeCode": 5,
                "amount": 1000,
                "contactless": false
            }
        ]
    },
    "additionalDetails": {
        "accountingDepartmentEmails": [
            ""
        ],
        "transmissionMethod": "A",
        "avoidEmailGrouping": false,
        "documentTemplate": ""
    },
    "details": [
        {
            "lineNo": 1,
            "classificationLineNo": 1,
            "ItemCodification": "",
            "cpvCode": "0",
            "descriptions": [
                "ΦΑΡΜΑΚΑ ΜΕ  6% ΦΠΑ"
            ],
            "measurementUnitCodeEN": "H87",
            "quantity": 1,
            "unitPrice": 943.4,
            "netTotal": 943.4,
            "total": 1000,
            "vatTotal": 56.6,
            "vatExemptionCategoryCode": 0,
            "vatCategory": "6.00",
            "vatCategoryCode": 3,
            "isInformative": false,
            "isHidden": false,
            "recordTypeCode": 0,
            "incomeClassification": {
                "id": 0,
                "classificationTypeCode": "E3_561_001",
                "classificationCategoryCode": "category1_1",
                "amount": 0
            }
        }
    ],
    "summaries": {
        "totalNetAmount": 943.4,
        "totalVATAmount": 56.6,
        "totalGrossValue": 1000
    },
    "vatAnalysis": [
        {
            "name": "6.00",
            "percentage": 6,
            "vatAmount": 56.6,
            "underlyingValue": 943.4
        }
    ],
    "miscellaneousData": {
        "moreInformation1": "",
        "moreInformation2": "",
        "moreInformation3": ""
    },
    "b2GDetails": {
        "contractingAuthority": "ΓΕΝΙΚΟ ΝΟΣΟΚΟΜΕΙΟ ΘΕΣΣΑΛΟΝΙΚΗΣ ΙΠΠΟΚΡΑΤΕΙΟ",
        "contractingAuthorityCode": "1015.E00823.0001",
        "contractReferenceCode": "0",
        "contractTypeCode": "3|0"
    },
    "isDelayed": false,
    "isDelayedCode": 0
}