{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbafa347dc5cb2f1fd19b1051026db9ea437968e4ee74dee8ce77406ae5424bbf",
    "signature": "0x2f5aa663fa0e1c68312714741365fc34e642a88ed4298fe8c6ce8ee61a9cfc055080993c3402f051829aff0fa916305e33b3c4cdd721570cf22cfc045e7bf0a41b",
    "signer": "0x7C281F670023af5435BC40477f844ae13ba5E04f",
    "userId": "841661140"
  }
}