{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x79a487dd89e1088c47284fb0408a196ace64778ed14fd937163eeb4bc925c678",
    "signature": "0x0eb428871c92ca006e829f7afb1a727cc507bc1763af097265b2b717c94eff646ccf48a21f8990cc11d5af1b39c379b363dde7f67e5b98d9681b6440b255b1341b",
    "signer": "0x5BAc9D57712D346870290a6Aa9Abb706a8AeC757",
    "userId": "232444314"
  }
}