curl --request POST \
  --url https://your-instance.example.com/api/contacts/{id}/separate \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "fieldSplit": {
    "firstName": {
      "original": "Jane",
      "new": "Janet"
    },
    "lastName": {
      "original": "Doe",
      "new": "Doe"
    },
    "status": "original",
    "pipelineId": "original",
    "pipelineStage": "original",
    "assignees": "original",
    "outreachConfigId": "original"
  },
  "childRecordAssignment": {
    "conversations": {
      "64f0a1b2c3d4e5f6a7b8c9e0": "new"
    },
    "applications": {},
    "contactNotes": {},
    "reminders": {},
    "trainingSnapshots": {}
  }
}
'

import requests

url = "https://your-instance.example.com/api/contacts/{id}/separate"

payload = {
    "fieldSplit": {
        "firstName": {
            "original": "Jane",
            "new": "Janet"
        },
        "lastName": {
            "original": "Doe",
            "new": "Doe"
        },
        "status": "original",
        "pipelineId": "original",
        "pipelineStage": "original",
        "assignees": "original",
        "outreachConfigId": "original"
    },
    "childRecordAssignment": {
        "conversations": { "64f0a1b2c3d4e5f6a7b8c9e0": "new" },
        "applications": {},
        "contactNotes": {},
        "reminders": {},
        "trainingSnapshots": {}
    }
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    fieldSplit: {
      firstName: {original: 'Jane', new: 'Janet'},
      lastName: {original: 'Doe', new: 'Doe'},
      status: 'original',
      pipelineId: 'original',
      pipelineStage: 'original',
      assignees: 'original',
      outreachConfigId: 'original'
    },
    childRecordAssignment: {
      conversations: {'64f0a1b2c3d4e5f6a7b8c9e0': 'new'},
      applications: {},
      contactNotes: {},
      reminders: {},
      trainingSnapshots: {}
    }
  })
};

fetch('https://your-instance.example.com/api/contacts/{id}/separate', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://your-instance.example.com/api/contacts/{id}/separate",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'fieldSplit' => [
        'firstName' => [
                'original' => 'Jane',
                'new' => 'Janet'
        ],
        'lastName' => [
                'original' => 'Doe',
                'new' => 'Doe'
        ],
        'status' => 'original',
        'pipelineId' => 'original',
        'pipelineStage' => 'original',
        'assignees' => 'original',
        'outreachConfigId' => 'original'
    ],
    'childRecordAssignment' => [
        'conversations' => [
                '64f0a1b2c3d4e5f6a7b8c9e0' => 'new'
        ],
        'applications' => [
                
        ],
        'contactNotes' => [
                
        ],
        'reminders' => [
                
        ],
        'trainingSnapshots' => [
                
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://your-instance.example.com/api/contacts/{id}/separate"

	payload := strings.NewReader("{\n  \"fieldSplit\": {\n    \"firstName\": {\n      \"original\": \"Jane\",\n      \"new\": \"Janet\"\n    },\n    \"lastName\": {\n      \"original\": \"Doe\",\n      \"new\": \"Doe\"\n    },\n    \"status\": \"original\",\n    \"pipelineId\": \"original\",\n    \"pipelineStage\": \"original\",\n    \"assignees\": \"original\",\n    \"outreachConfigId\": \"original\"\n  },\n  \"childRecordAssignment\": {\n    \"conversations\": {\n      \"64f0a1b2c3d4e5f6a7b8c9e0\": \"new\"\n    },\n    \"applications\": {},\n    \"contactNotes\": {},\n    \"reminders\": {},\n    \"trainingSnapshots\": {}\n  }\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://your-instance.example.com/api/contacts/{id}/separate")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"fieldSplit\": {\n    \"firstName\": {\n      \"original\": \"Jane\",\n      \"new\": \"Janet\"\n    },\n    \"lastName\": {\n      \"original\": \"Doe\",\n      \"new\": \"Doe\"\n    },\n    \"status\": \"original\",\n    \"pipelineId\": \"original\",\n    \"pipelineStage\": \"original\",\n    \"assignees\": \"original\",\n    \"outreachConfigId\": \"original\"\n  },\n  \"childRecordAssignment\": {\n    \"conversations\": {\n      \"64f0a1b2c3d4e5f6a7b8c9e0\": \"new\"\n    },\n    \"applications\": {},\n    \"contactNotes\": {},\n    \"reminders\": {},\n    \"trainingSnapshots\": {}\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://your-instance.example.com/api/contacts/{id}/separate")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"fieldSplit\": {\n    \"firstName\": {\n      \"original\": \"Jane\",\n      \"new\": \"Janet\"\n    },\n    \"lastName\": {\n      \"original\": \"Doe\",\n      \"new\": \"Doe\"\n    },\n    \"status\": \"original\",\n    \"pipelineId\": \"original\",\n    \"pipelineStage\": \"original\",\n    \"assignees\": \"original\",\n    \"outreachConfigId\": \"original\"\n  },\n  \"childRecordAssignment\": {\n    \"conversations\": {\n      \"64f0a1b2c3d4e5f6a7b8c9e0\": \"new\"\n    },\n    \"applications\": {},\n    \"contactNotes\": {},\n    \"reminders\": {},\n    \"trainingSnapshots\": {}\n  }\n}"

response = http.request(request)
puts response.read_body

{
  "success": true,
  "data": {
    "originalContactId": "64f0a1b2c3d4e5f6a7b8c9d0",
    "newContactId": "64f0a1b2c3d4e5f6a7b8ca20",
    "summary": {
      "conversationsMoved": 1,
      "applicationsMoved": 0,
      "notesMoved": 0,
      "remindersMoved": 0,
      "trainingSnapshotsMoved": 0,
      "messagesReassigned": 4
    }
  }
}

{
  "error": "Attachment not found",
  "message": "Attachment not found"
}

{
  "error": "Attachment not found",
  "message": "Attachment not found"
}

{
  "error": "Attachment not found",
  "message": "Attachment not found"
}

{
  "error": "Attachment not found",
  "message": "Attachment not found"
}