{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1cc6198c247ebe52e4f96f3b991a37c7e4fce26182c7ac9d788fd6647487edfb",
    "signature": "0x7f6442bf6557fee2ca4ab7093cc011698c0d7b8e12a1aefc24b53dd412ad03db32f1e73e4d54b9357e17ba2c437e769f7e9a99465a9879621d556fe8797693cc1b",
    "signer": "0x10F9eFF84cB30B2B7ed51c28ee2e13498e18e14E",
    "userId": "841833512"
  }
}