Creates a new object of the specified type.

For contacts and companies, the system automatically deduplicates:

• Contacts are matched by email — if a contact with the same email exists, it will be updated instead.
• Companies are matched by domain, LinkedIn URL, or name similarity.

Custom objects are always created as new records.

{
  "name": "Alex Johnson",
  "fields": {
    "email": "alex@acme.com",
    "role": "Engineer",
    "industry": "Technology",
    "custom_score": 95
  }
}

{
  "data": {
    "id": 123,
    "name": "Alex Johnson",
    "email": "alex@acme.com"
  }
}