Request Payload:
{
    "customerId": 5924,
    "serviceId": 1,
    "specializationId": 1,
    "sourceLanguageId": 31,
    "targetLanguagesIds": [
        31
    ],
    "name": "Second Project for Client 5924 - 2025-11-27 19:31:58",
    "categoriesIds": [
        35
    ],
    "inputFiles": [
        {
            "name": "sample.txt",
            "url": "https:\/\/www.w3.org\/TR\/PNG\/iso_8859-1.txt",
            "category": "WORKFILE"
        }
    ],
    "dates": {
        "startDate": {
            "time": 1764271918054
        },
        "deadline": {
            "time": 1764876718000
        }
    },
    "instructions": {
        "fromCustomer": "Please prioritize this second project.",
        "forProvider": "Maintain consistency with previous project.",
        "internal": "Follow up with client after submission.",
        "paymentNoteForCustomer": "Invoice after completion.",
        "paymentNoteForVendor": "Standard vendor terms apply.",
        "notes": "Second project created via API."
    },
    "people": {
        "responsiblePersons": {
            "projectManagerId": 59
        },
        "customerContacts": {
            "primaryId": 12741,
            "sendBackToId": 12741,
            "additionalIds": []
        }
    }
}

Project Creation Results:
HTTP Status Code: 404
ERROR: Project creation failed.
Message: no entity Customer with id: 5924