{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5d4cbd64850c51f190699e8dc7a87b0a3d55eeba9225edde485c038e4007fd59",
    "signature": "0x710fadbf649e1488a46d62988a9a5fada38b0c46f5fe6d965ec4142d0da5ea273688885b84fee2d8e90ba9cb423eac2826f314f21f6aa5588487cfbf1176aa961c",
    "signer": "0x89bD5BB142c0abEadd41095cAd1eE78919474744",
    "userId": "111260257"
  }
}