curl --request PUT \
  --url https://api.attio.com/v2/lists/{list}/entries/{entry_id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "data": {
    "entry_values": {
      "41252299-f8c7-4b5e-99c9-4ff8321d2f96": "Text value",
      "multiselect_attribute": [
        "Select option 1",
        "Select option 2"
      ]
    }
  }
}'

{
  "data": {
    "id": {
      "workspace_id": "14beef7a-99f7-4534-a87e-70b564330a4c",
      "list_id": "33ebdbe9-e529-47c9-b894-0ba25e9c15c0",
      "entry_id": "2e6e29ea-c4e0-4f44-842d-78a891f8c156"
    },
    "parent_record_id": "891dcbfc-9141-415d-9b2a-2238a6cc012d",
    "parent_object": "people",
    "created_at": "2022-11-21T13:22:49.061281000Z",
    "entry_values": {
      "status": [
        {
          "active_from": "2023-01-01T15:00:00.000000000Z",
          "active_until": null,
          "created_by_actor": {
            "type": "workspace-member",
            "id": "50cf242c-7fa3-4cad-87d0-75b1af71c57b"
          },
          "status": {
            "id": {
              "workspace_id": "14beef7a-99f7-4534-a87e-70b564330a4c",
              "object_id": "33ebdbe9-e529-47c9-b894-0ba25e9c15c0",
              "attribute_id": "e350362f-4b55-4c0f-93f4-379ae8ff2e5b",
              "status_id": "527def35-7994-4ef7-9584-80ef8de352a8"
            },
            "title": "In Progress",
            "is_archived": false,
            "target_time_in_status": null,
            "celebration_enabled": false
          },
          "attribute_type": "status"
        }
      ],
      "created_at": [
        {
          "active_from": "2023-01-01T15:00:00.000000000Z",
          "active_until": null,
          "created_by_actor": {
            "type": "workspace-member",
            "id": "50cf242c-7fa3-4cad-87d0-75b1af71c57b"
          },
          "value": "2023-01-01T15:00:00.000000000Z",
          "attribute_type": "timestamp"
        }
      ],
      "created_by": [
        {
          "active_from": "2023-01-01T15:00:00.000000000Z",
          "active_until": null,
          "created_by_actor": {
            "type": "workspace-member",
            "id": "50cf242c-7fa3-4cad-87d0-75b1af71c57b"
          },
          "referenced_actor_id": "50cf242c-7fa3-4cad-87d0-75b1af71c57b",
          "referenced_actor_type": "workspace-member",
          "attribute_type": "actor-reference"
        }
      ]
    }
  }
}