{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2b5eddd9c52491a77f8c197d5aa4a9bd7a787351ae330e829c9416add4ccaa5a",
    "signature": "0x9611a1eb30b614a62299b670973cea3a6c0746ce49400d1cb14560ba4fb51981244ea5698d843216e83c98a62b3abb4fa350a0e944bdf1fe6a9132ef50f820ab1c",
    "signer": "0xb53d8F14E1CFcDFcBEe3f70ee1076d7aC2B68802",
    "userId": "225339385"
  }
}