curl --request POST \
  --url https://api.ezapi.com.br/instances/{instanceId}/token/{instanceToken}/privacy/group-add \
  --header 'Client-Token: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "type": "CONTACT_BLACKLIST",
  "contactsBlacklist": [
    {
      "action": "add",
      "phone": "{{PHONE}}"
    },
    {
      "action": "remove",
      "phone": "{{PHONE}}"
    }
  ]
}
'

import requests

url = "https://api.ezapi.com.br/instances/{instanceId}/token/{instanceToken}/privacy/group-add"

payload = {
    "type": "CONTACT_BLACKLIST",
    "contactsBlacklist": [
        {
            "action": "add",
            "phone": "{{PHONE}}"
        },
        {
            "action": "remove",
            "phone": "{{PHONE}}"
        }
    ]
}
headers = {
    "Client-Token": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Client-Token': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    type: 'CONTACT_BLACKLIST',
    contactsBlacklist: [{action: 'add', phone: '{{PHONE}}'}, {action: 'remove', phone: '{{PHONE}}'}]
  })
};

fetch('https://api.ezapi.com.br/instances/{instanceId}/token/{instanceToken}/privacy/group-add', 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://api.ezapi.com.br/instances/{instanceId}/token/{instanceToken}/privacy/group-add",
  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([
    'type' => 'CONTACT_BLACKLIST',
    'contactsBlacklist' => [
        [
                'action' => 'add',
                'phone' => '{{PHONE}}'
        ],
        [
                'action' => 'remove',
                'phone' => '{{PHONE}}'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Client-Token: <api-key>",
    "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://api.ezapi.com.br/instances/{instanceId}/token/{instanceToken}/privacy/group-add"

	payload := strings.NewReader("{\n  \"type\": \"CONTACT_BLACKLIST\",\n  \"contactsBlacklist\": [\n    {\n      \"action\": \"add\",\n      \"phone\": \"{{PHONE}}\"\n    },\n    {\n      \"action\": \"remove\",\n      \"phone\": \"{{PHONE}}\"\n    }\n  ]\n}")

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

	req.Header.Add("Client-Token", "<api-key>")
	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://api.ezapi.com.br/instances/{instanceId}/token/{instanceToken}/privacy/group-add")
  .header("Client-Token", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"type\": \"CONTACT_BLACKLIST\",\n  \"contactsBlacklist\": [\n    {\n      \"action\": \"add\",\n      \"phone\": \"{{PHONE}}\"\n    },\n    {\n      \"action\": \"remove\",\n      \"phone\": \"{{PHONE}}\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.ezapi.com.br/instances/{instanceId}/token/{instanceToken}/privacy/group-add")

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

request = Net::HTTP::Post.new(url)
request["Client-Token"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"type\": \"CONTACT_BLACKLIST\",\n  \"contactsBlacklist\": [\n    {\n      \"action\": \"add\",\n      \"phone\": \"{{PHONE}}\"\n    },\n    {\n      \"action\": \"remove\",\n      \"phone\": \"{{PHONE}}\"\n    }\n  ]\n}"

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

{
  "success": true
}

{
  "error": "Unauthorized",
  "message": "Invalid instanceToken"
}

{
  "error": "Instance not found"
}

{
  "error": "Worker command timeout"
}

{
  "error": "Unable to process request"
}