curl --request PATCH \
  --url https://api.scribe-mail.com/v1/marketing_campaigns/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "marketing_campaign": {
    "name": "<string>",
    "start_time": "2023-11-07T05:31:56Z",
    "end_time": "2023-11-07T05:31:56Z",
    "time_zone": "<string>",
    "send_email": true,
    "smart_fields_conditions": [
      [
        {
          "smart_field_id": "<string>",
          "values": [
            "<string>"
          ]
        }
      ]
    ],
    "signature_template_ids": [
      "<string>"
    ]
  }
}
'

{
  "data": {
    "id": "<string>",
    "name": "<string>",
    "send_email": true,
    "content": {},
    "smart_fields_conditions": [
      [
        {
          "smart_field_id": "<string>",
          "values": [
            "<string>"
          ]
        }
      ]
    ],
    "signature_template_ids": [
      "<string>"
    ],
    "start_time": "2023-11-07T05:31:56Z",
    "end_time": "2023-11-07T05:31:56Z",
    "time_zone": "<string>",
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z"
  }
}