{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc85c4b23248cfe9d671903df3da569e58b36b3fd05be940916c63cd63f0fbadc",
    "signature": "0x83810f07a44241c186da9e3a44a21690318d3c6760fdd9b332379660eac0da7b1cc8fabaa9fdc11df8b148f92548bcab3cc9507d85f3832099bd57d4e97a90371c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}