{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x92fc35935bace0a78412a9e3a14fb6659633c506f439b71f322fdb6b9f536941",
    "signature": "0x12b6d8431e844d6a6885cad213f3a87cfef57bda3e172ff06ab2449d1a7903953555d1e509a1c745b90e68a2e27f7eb4f31bee415aa25a6eae104f50198170e81c",
    "signer": "0x9698A898Ed554B831a7BB69972E1B05eCC560430",
    "userId": "967510490"
  }
}