Envelope Creation dont create Contact and dont send email.

Question

Hi, when I create an envelope using the API, the recipients are not created in contacts and the emails are not sent, even when I try to resend...

When I am trying to create an envelope through the UI and it works fine. The contacts are created and the
envelope is sent.

https://demo.docusign.net/restapi/v2.1/accounts/{{Account}}/envelopes/

{
    "Documents":  
        {
            "DocumentBase64": "...",
            "DocumentId": 1,
            "FileExtension": "Docx",
            "Name": "nomedotemplate"
        }
    ],
    "EmailSubject": "SellersFi",
    "Recipients": {
        "Signers":  
            {
                "Email": "joao.c@outlook.com",
                "Name": "new contact",
                "RecipientId": "312",
                "RoutingOrder": 1,
                "ClientUserId": "312",
                "Tabs": {
                    "SignHereTabs":  
                        {
                            "AnchorString": "0SFSIGNHERE",
                            "Name": "Please sign here",
                            "Optional": false,
                            "RecipientId": "312",
                            "ScaleValue": 0,
                            "DocumentId": 1
                        }
                    ]
                }
            }
        ]
    },
    "Status": "sent",
    "RecipientId": 1,
    "EmailBlurb": "teste",
    "RoleName": "S1",
    "RoutingOrder": "1",
    "Name": "Sellers Fi",
    "Email": "privacy@sellersfunding.com"
}