curl --request POST \
  --url https://api.metal.ai/v1/activities \
  --header 'Content-Type: application/json' \
  --header 'x-metal-api-key: <api-key>' \
  --header 'x-metal-client-id: <api-key>' \
  --data '
{
  "subject": "<string>",
  "type": "<string>",
  "startedAt": "2023-11-07T05:31:56Z",
  "endedAt": "2023-11-07T05:31:56Z",
  "participants": [
    {
      "id": "<string>",
      "type": "<string>"
    }
  ],
  "deals": [
    "<string>"
  ],
  "externalReference": {
    "source": "<string>",
    "id": "<string>"
  },
  "isPrivate": true
}
'

{
  "data": {
    "id": "<string>",
    "subject": "Intro call with management",
    "type": "Meeting",
    "startedAt": "2023-11-07T05:31:56Z",
    "endedAt": "2023-11-07T05:31:56Z",
    "participants": [
      {
        "id": "<string>",
        "type": "<string>"
      }
    ],
    "deals": [
      "<string>"
    ],
    "relatedResources": [
      {
        "id": "<string>",
        "type": "<string>"
      }
    ],
    "externalReference": {
      "source": "<string>",
      "id": "<string>"
    },
    "isPrivate": true,
    "createdAt": "2023-11-07T05:31:56Z",
    "updatedAt": "2023-11-07T05:31:56Z"
  }
}