{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb144d62a4ac9ec070920315f10ab22dd063790a32503aaf0742e2b2a211d2f2e",
    "signature": "0xff752d3fe75fa1a22e098b561650a1bd89a82076ba8e46dd3a45f5c7f740a33c07706b1f488726ac8030c089ab0fb979701965c4ed24ff1bdc4e440b1ed0bce51c",
    "signer": "0x7Ff131D44721BcC4A48b496f684DCEA984Ee86B5",
    "userId": "274329356"
  }
}