{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x749c100e040ffc93daaffddc7a44c8f2e7c9a8b407815a49ca3496a436c45275",
    "signature": "0x512ec54c60fef326dcdf11d4ebf3cd9dabb5a6561ddb8f1e93981c1b75b5fe74215df9de4cafe3aa224354e25301bd1bfbead084452708171bedae604f62084e1c",
    "signer": "0x7ecD8f8E7fA97dC1b21dA7021DAc66098c6f1b8A",
    "userId": "745723312"
  }
}