curl --request PATCH \
  --url https://{host}/v1/me/notification-preferences \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '
{
  "data": {
    "type": "notification-preferences",
    "attributes": {
      "categories": {
        "price_drops": {
          "push": false
        },
        "saved_searches": {
          "push": false
        }
      }
    }
  }
}
'

const options = {
  method: 'PATCH',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/vnd.api+json'},
  body: JSON.stringify({
    data: {
      type: 'notification-preferences',
      attributes: {categories: {price_drops: {push: false}, saved_searches: {push: false}}}
    }
  })
};

fetch('https://{host}/v1/me/notification-preferences', 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://{host}/v1/me/notification-preferences",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PATCH",
  CURLOPT_POSTFIELDS => json_encode([
    'data' => [
        'type' => 'notification-preferences',
        'attributes' => [
                'categories' => [
                                'price_drops' => [
                                                                'push' => false
                                ],
                                'saved_searches' => [
                                                                'push' => false
                                ]
                ]
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/vnd.api+json"
  ],
]);

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

curl_close($curl);

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

import requests

url = "https://{host}/v1/me/notification-preferences"

payload = { "data": {
        "type": "notification-preferences",
        "attributes": { "categories": {
                "price_drops": { "push": False },
                "saved_searches": { "push": False }
            } }
    } }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/vnd.api+json"
}

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

print(response.text)

{
  "data": {
    "type": "notification-preferences",
    "id": "4711",
    "attributes": {
      "categories": {
        "messages": {
          "push": true,
          "mail": true
        },
        "offers": {
          "push": true,
          "mail": true
        },
        "saved_searches": {
          "push": true,
          "mail": true
        },
        "price_drops": {
          "push": false,
          "mail": true
        },
        "orders": {
          "push": true,
          "mail": true
        },
        "shop": {
          "push": true,
          "mail": true
        },
        "security": {
          "push": true,
          "mail": true
        }
      },
      "defaults": {
        "messages": {
          "push": true,
          "mail": true
        },
        "offers": {
          "push": true,
          "mail": true
        },
        "saved_searches": {
          "push": true,
          "mail": true
        },
        "price_drops": {
          "push": true,
          "mail": true
        },
        "orders": {
          "push": true,
          "mail": true
        },
        "shop": {
          "push": true,
          "mail": true
        },
        "security": {
          "push": true,
          "mail": true
        }
      },
      "labels": {
        "messages": {
          "label": "Messages",
          "description": "Somebody replied in one of your conversations.",
          "locked": [],
          "lockedNote": null,
          "managedPerSearch": false
        },
        "offers": {
          "label": "Offers",
          "description": "An offer was accepted, refused, countered, or made to you.",
          "locked": [],
          "lockedNote": null,
          "managedPerSearch": false
        },
        "saved_searches": {
          "label": "Saved searches",
          "description": "A saved search found something new. How often is set per search.",
          "locked": [
            "push",
            "mail"
          ],
          "lockedNote": null,
          "managedPerSearch": true
        },
        "price_drops": {
          "label": "Price drops and favorites",
          "description": "A watch you saved got cheaper, was reserved or was sold.",
          "locked": [],
          "lockedNote": null,
          "managedPerSearch": false
        },
        "orders": {
          "label": "Orders",
          "description": "Your payment was recognised, or your watch is on its way.",
          "locked": [
            "push",
            "mail"
          ],
          "lockedNote": "Always on: you need these to stay updated on your orders.",
          "managedPerSearch": false
        },
        "shop": {
          "label": "Your shop",
          "description": "A buyer wrote to your shop, made an offer, or paid for a watch.",
          "locked": [],
          "lockedNote": null,
          "managedPerSearch": false
        },
        "security": {
          "label": "Account security",
          "description": "A sign-in, or a change to your password or second factor.",
          "locked": [
            "push",
            "mail"
          ],
          "lockedNote": "Always on, by email and in the app. This is how you find out somebody else changed your account.",
          "managedPerSearch": false
        }
      }
    }
  }
}

{
  "errors": [
    {
      "status": "404",
      "code": "watch_reserved",
      "title": "Not Found",
      "detail": "<string>",
      "meta": {},
      "source": {
        "pointer": "/data/attributes/reference",
        "parameter": "<string>"
      }
    }
  ],
  "jsonapi": {
    "version": "1.0"
  }
}

{
  "errors": [
    {
      "status": "404",
      "code": "watch_reserved",
      "title": "Not Found",
      "detail": "<string>",
      "meta": {},
      "source": {
        "pointer": "/data/attributes/reference",
        "parameter": "<string>"
      }
    }
  ],
  "jsonapi": {
    "version": "1.0"
  }
}