{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8a5d1cd4827d387eb29bded649a8d8701adf67cb3f94b996ccd7b69f22e3238b",
    "signature": "0xe775de9ec21372a3d4a79bac6871d1d204bb73d42e7b904f8878d09088a97701657230e824fb0f9478527093f6e52bb7f3b6f160dc47bc9ab891c319205886841c",
    "signer": "0xDd2c9d2D9FE2896f0cDDDe8FA8894c2c51d2a589",
    "userId": "203576373"
  }
}