{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd924694a63bf1ceffe7fe11106f71a885459dcf8714a2f47c2973c7a6f5ccb91",
    "signature": "0xfcb1a0d1581073c65e92928531c1062fbfe2791625ad48c0fc5f9cd7a487b5ff2081902664a8093f5720f12c711c3d579acfe92ab95ffe00927876ef231cc6341c",
    "signer": "0xFef4Dd9023A7Fbad11746cd9e05B5dbc92a4B3Ae",
    "userId": "405788067"
  }
}