curl --request POST \
  --url https://api.example.com/public/emails \
  --header 'Content-Type: application/json' \
  --data '
{
  "email_type": "<string>",
  "origin": "<string>",
  "email_timestamp": "2023-11-07T05:31:56Z",
  "contact_email": "jsmith@example.com",
  "contact_id": 123,
  "agent_email": "jsmith@example.com",
  "subject": "<string>",
  "body_text": "<string>",
  "body_html": "<string>",
  "campaign_id": "<string>",
  "campaign_name": "<string>",
  "interested": true,
  "custom_fields": [
    {
      "field_name": "<string>",
      "field_value": "<string>"
    }
  ]
}
'

{
  "id": 123,
  "updated_time": "2023-11-07T05:31:56Z",
  "email_type": "<string>",
  "origin": "<string>",
  "email_timestamp": "2023-11-07T05:31:56Z",
  "contact_email": "jsmith@example.com",
  "contact_id": 123,
  "agent_email": "jsmith@example.com",
  "subject": "<string>",
  "body_text": "<string>",
  "body_html": "<string>",
  "campaign_id": "<string>",
  "campaign_name": "<string>",
  "interested": true,
  "custom_fields": [
    {
      "id": 123,
      "updated_time": "2023-11-07T05:31:56Z",
      "field_name": "<string>",
      "field_value": "<string>"
    }
  ]
}