{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9e45392e0a5814bc545066b1fd46a1c196be9884548acc2d32687e1e1ad32a16",
    "signature": "0x317386c265e14297947e796373bbf34a1bcf420f943cfa8698a812741b43074c697ccf000b824ae0f58b2051ecc1f11efeda057e3108930e8551cf83d2cefc281b",
    "signer": "0xfC62fE09aBA088B02e3F914a120C6B67a48bd57C",
    "userId": "596638791"
  }
}