curl --request POST \
  --url https://dovetail.com/api/v1/contacts \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "name": "John Smith",
  "email": "john@dovetail.com",
  "fields": [
    {
      "label": "salesforce_id",
      "value": "003XX000004TmiQQAS"
    }
  ]
}'

{
  "data": {
    "id": "<string>",
    "name": "<string>",
    "created_at": "<string>",
    "fields": [
      {
        "label": "<string>",
        "value": "<string>",
        "type": "BOOLEAN"
      }
    ]
  }
}