{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x94274493eb1e78771938c53e3856d023e679784c30cc06e167069e9b49a7bfed",
    "signature": "0xad4440a4e7f7774d03071365fc5fd570457bf13ba98370ba636b35c16b0da8ce290a244442221e517a88110fb631e60ff5ca453c3ea1515ecd45eaf2a569a02f1c",
    "signer": "0x7466F6Db24ca9b1e214cbD2D5e0B3F67279DaAe5",
    "userId": "97605604"
  }
}