{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x97c829ea03ed87f3774a85486a6f77c60cb56f9f2f5c50d0d7604a538f4b65e2",
    "signature": "0x874e044933a5a99a59ef61cc1404f14ff11d1be39ab6eb305aac1ee1296699800dffca7038705f3bfe91bea27fad92c1847f39b41a17915cdab03d1539774d461c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}