{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9de2d193782fa8640f488ece381f35c9a8072837bf0948113aec0fc3e5f59a57",
    "signature": "0xdfbd7d221400b0ab57e4ebb66a8b91fd84bb0e998cefd21e6d30d3bd95d74fe72557a9aee215bdfb0aac31fe13946ed60e087fc133184cb3741fdbb256c49b4b1b",
    "signer": "0x3fb1bfc1A904DCb211FDe58A7203F73e6a4D6668",
    "userId": "379730232"
  }
}