POST multile lines via REST in Custom Object

Content

Hi ,

We have created custom object & we are dumping data in Object from external system.

As of now it is working fine for inserting single records.

is there any way we can insert multiple line via single JSON payload?

I tried Modifying JSON but it is not working.

Not Working: error: Invalid attribute "items" in the payload. - I took "Items" from GET

{

    "items":[

    {

        "RecordName" :"K13B5124_1N9N2312","ContractNumber_c" :"513B5124","UnitNumber_c" :"1N9N2312","ContractDescription_c" :"API","ContractType_c" :"J1","ContractEffectiveDate_c" :"2020-06-20","ContractCompletionDate_c" :"2021-06-20","BusinessUnit_c" :"500000002","Supervisor_c" :"MP","Flag_c" :"JC","ContractStartDate_c"