{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe0debf0f79ef59ff9f9074856f1ce335314e046e2f3120c6e851cd3cbf3d01f2",
    "signature": "0x4542359e5bc83c25ce3265439a1f70299509f31c8011a5b1ba260618b283855e02c44cc7e58f916cfc75a0222198760de0ace375cb5b03b1c3669cf2446ecf0f1c",
    "signer": "0xCA34537176e273Efc43776B70B5c70CdD5baE067",
    "userId": "403911835"
  }
}