{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x39838b95c6ac6d521c9734ae0ff40c0c36a60d1acf01be612a4be942a29bf258",
    "signature": "0xfab3b3c2ecbbbbcff82d987cad07b240c992809fd4ccbf53b412397e6e820ba622af19da4f45cd25b549a3530983686e99ad41cda986ccb56837e84f68140a8a1c",
    "signer": "0x9acF8CBE8f2B0d51e756C58D6d1f946A8757602F",
    "userId": "428941685"
  }
}