{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x32784073911835e15e4e65732f0d10876d3a80e1bb42e7df4f32357518cb50b7",
    "signature": "0xcf149b5867a6e93180b67fabcd9226fd9b692367316c252df53dbbd7e36e1a8c3fe8692137c1c9be79a6e6359ccba7da0bb38963347639dbc66b5587f840a6831c",
    "signer": "0x354ed9e3b93fbae011B9648914AA74FaB4Fa295c",
    "userId": "906232662"
  }
}