POST multiple object single curl

Hello,

I'd like to be able to POST multiple object in a single requests. Eg, 2 datagroup

    {
      "records": [
        {
          "data": "Office",
          "name": "12.12.12.12/32"
        }
      ],
      "type": "ip",
      "selfLink": "https://localhost/mgmt/tm/ltm/data-group/internal/~Common~whitelist_ip?ver=13.0.0",
      "generation": 1,
      "fullPath": "/Common/whitelist_ip",
      "partition": "Common",
      "name": "whitelist_ip",
      "kind": "tm:ltm:data-group:internal:internalstate"
    },
    {
      "records": [
        {
          "data": "whatever",
          "name": "23.23.23.23/32"
        }
      ],
      "type": "ip",
      "selfLink": "https://localhost/mgmt/tm/ltm/data-group/internal/~Common~block_ip?ver=13.0.0",
      "generation": 1,
      "fullPath": "/Common/block_ip",
      "partition": "Common",
      "name": "block_ip",
      "kind": "tm:ltm:data-group:internal:internalstate"
    }


Doing it for a single object work but when I try to encapsulate both in {} or { "items": [ ] } , it doesn't work :

    {"code":403,"message":"Operation is not supported on component /ltm/data-group/internal.","errorStack":[],"apiError":1}

Is there a way to POST an existing object and replace it ? Or I have to PATCH a specific property ? Ideally I'd like to keep my full JSON object in GIT, so any time i have a change, I just need to update it and do the update. If I have no choice to use PATCH and only reset the specify property it's gonna be more complex.