{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc12832ab13b3268e3ec5fda32d4489371d2984951cb385be99c7a2665392e779",
    "signature": "0x3b1c5b87aa7da4f509b06405497c867711cb30d84ff815904e8aa8ac77fd587602074054832f577a07effd8fe24e5593cf77267de86eda6a8ab398546a8643da1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}