{
  "manageEntity": {
    "action": "Save",
    "entityId": "255428578",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x85d1fe95afca4c3a1534a2f9d940fb3cc44e1ed0b693b1f0ed7a94d3c6ed3d89",
    "signature": "0x0e9adeb87598c5cb3a1a2ff365f7cabd2ef747cfa86ce1cee774b596219a8479582c6b59a8d816fe5235eb00f8273413754b3c30b6078f11389dbc3625dc78e11c",
    "signer": "0xCC89cD92c6e13cFe8FaD7993190B2DD0899Fbb58",
    "userId": "780759970"
  }
}