{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x79f68fd03633f884401a595c843d79b4e709e0d1d6bca59b7f1af366dbdf36b9",
    "signature": "0x283bf41ba57ace9112855da4c8f9173c6b6dc449c2e19a79a4edc9ab001cc1cd77dbface933a36b4dcff28d6070b1c3c9faa338968bc29c1d1577724491b88201b",
    "signer": "0x7bae2bFbA4Dc339400A10B76D2C6373664e15354",
    "userId": "491386326"
  }
}