Cant succed to create a contract from the api !

Here is my input values

{
    "source": 1,
    "inputfields": [
        {
            "metaApiName": "contract-type",
            "inputs": [
                {
                    "inputApiName": "contract-type",
                    "inputValue": "software-as-a-service-agreement"
                }
            ]
        },
        {
            "metaApiName": "title",
            "inputs": [
                {
                    "inputApiName": "title",
                    "inputValue": "SLA with Zylker"
                }
            ]
        },
        {
            "metaApiName": "description",
            "inputs": [
                {
                    "inputApiName": "description",
                    "inputValue": "Test Contracts Description API"
                }
            ]
        },
        {
            "metaApiName": "requester-name",
            "inputs": [
                {
                    "inputApiName": "requester-name",
                    "inputValue": "Test Requester API"
                }
            ]
        },
        {
            "metaApiName": "requester-department",
            "inputs": [
                {
                    "inputApiName": "requester-department",
                    "inputValue": "Sales"
                }
            ]
        },
        {
            "metaApiName": "party-b-name",
            "inputs": [
                {
                    "inputApiName": "party-b-name",
                    "inputValue": "Student"
                }
            ]
        },
        {
            "metaApiName": "counterparty-primary-contact",
            "inputs": [
                {
                    "inputApiName": "party-b-primary-contact-name",
                    "inputValue": "laura.holmes@zylker.com"
                }
            ]
        },
        {
            "metaApiName": "contract-term",
            "inputs": [
                {
                    "inputApiName": "contract-term",
                    "inputValue": false
                }
            ]
        },
        {
            "metaApiName": "contract-effective-date",
            "inputs": [
                {
                    "inputApiName": "contract-effective-date",
                    "inputValue": 0
                },
                {
                    "inputApiName": "effective-specific-date",
                    "inputValue": "10/10/2025"
                }
            ]
        },
        {
            "metaApiName": "contract-end-date",
            "inputs": [
                {
                    "inputApiName": "contract-end-date",
                    "inputValue": 3
                },
                {
                    "inputApiName": "n-monthsyears-value",
                    "inputValue": 2
                },
                {
                    "inputApiName": "n-monthsyears-term",
                    "inputValue": 0
                }
            ]
        },
        {
            "metaApiName": "termination-notice-period",
            "inputs": [
                {
                    "inputApiName": "termination-notice-period",
                    "inputValue": 20
                }
            ]
        },
        {
            "metaApiName": "is-renewable",
            "inputs": [
                {
                    "inputApiName": "is-renewable",
                    "inputValue": true
                }
            ]
        },
        {
            "metaApiName": "renewal-type",
            "inputs": [
                {
                    "inputApiName": "renewal-type",
                    "inputValue": 0
                }
            ]
        },
        {
            "metaApiName": "notice-period-before-expiration",
            "inputs": [
                {
                    "inputApiName": "notice-period-before-expiration",
                    "inputValue": 5
                }
            ]
        },
        {
            "metaApiName": "send-expiration-reminder",
            "inputs": [
                {
                    "inputApiName": "send-expiration-reminder",
                    "inputValue": 15
                }
            ]
        },
        {
            "metaApiName": "amount",
            "inputs": [
                {
                    "inputApiName": "amount",
                    "inputValue": 1200
                }
            ]
        },
        {
            "metaApiName": "tax",
            "inputs": [
                {
                    "inputApiName": "tax",
                    "inputValue": 0
                }
            ]
        }
    ]
}


its giving something like 
{
    "contracts": []
}

how to fix this one?

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