{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5e40b0582cf3cc0d5dda226caa8c2fc3ce3735b292dc33c528ead599c43e159a",
    "signature": "0x81445ebb393c426f631ff8445142c9181ed45ba5703060e21a2bddd1854781fe72ee79a4a8b4fe887a49fa3dfe93754ce4d4c2913267d5dfccf41ebd92b1ce931c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}