{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb68601347ca93e7ed9de905ba037ed386ed512f5b0091555b7632801743a488d",
    "signature": "0x59df92bb543369a7db2144516f4adeb55221b80dc1333cf7c9b29910e86760a11d90283a27f8bc2b1c7b670cec693c2c0851a60c8e97af3dd38dc182123e39b61c",
    "signer": "0x53d114953EFE4751B70BF56Ae40956c01d541Eec",
    "userId": "795477070"
  }
}