{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3519ce911385c37f8e7293f5486de2e490c5dbfd67a2ac71b0d54567f43d3d3c",
    "signature": "0xba47abfd6263785cd70ed8f6e05889a539d67782454a0ee1a7f3e6c17f62513551ebfeb3406faf3077d7ec50549c2d4b6937a90eef282c501fc80db715c557d81c",
    "signer": "0x84683b76111c0e04b93499Bdd6801f25531DD5b2",
    "userId": "98061637"
  }
}