Create pack sticker

curl --request POST \
  --url https://api.fluxer.app/v1/packs/stickers/{pack_id} \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "image": "aSDinaTvuI8gbWludGxpZnk=",
  "description": "<string>",
  "tags": [
    "<string>"
  ]
}
'

{
  "id": "<string>",
  "name": "<string>",
  "description": "<string>",
  "tags": [
    "<string>"
  ],
  "animated": true
}