{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xff4308f09bd1070344821647c2a01c017a2a4f6767a1440e55f2617415ad1c4b",
    "signature": "0x172cb89f0a7aed922d1231134df004a33c59d7ea82ae4809ddc1c1c50af905be116fbbf5e6645d77e12ed26b81277e9e3e6092f12a3a185911f42328b180b3c21b",
    "signer": "0xcC2DfC9031aF217be97F95f00c1F649a5c476af1",
    "userId": "885906546"
  }
}