PUT /v1/eip/batch/instance/{action}{?clientToken} HTTP/1.1     
Host: bec.baidubce.com     
Authorization: authorization string     

{
    "backends": [
        {
            "eipId": "ip-xxxxxxxx",
            "instanceType": "instanceType",
            "instanceId": "instanceId",
            "instanceIp": "instanceIp",
            "mode": "mode"
        }
    ]
}

 PUT /v1/eip/batch/instance/bind HTTP/1.1     
 Host: bec.baidubce.com     
 Authorization: authorization string   
 
{
    "backends": [
        {
            "eipId": "ip-u5wf9tsj",
            "instanceType": "eni",
            "instanceId": "eni-r7ceb9jc7coa",
            "instanceIp": "172.16.0.144",
            "mode": "nat"
        }
    ]
}

 HTTP/1.1 200 OK     
 x-bce-request-id: 1214cca7 4ad5 451d 9215 71cb844c0a50     
 Date: Thu, 16 Mar 2022 06:29:48 GMT      
 Content Type: application/json;charset=UTF 8     
 Server: BWS     

{
    "result": true,
    "action": "bind",
    "details": [
        {
            "resourceId": "ip-u5wf9tsj",
            "success": true,
            "error": null
        }
    ]
}