{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5d2a12b2ce94647d4efbf5bc6770cfb7783b911f4b6d2f51846dd2177f7e4d5c",
    "signature": "0x2c53e68a7809c1016daf4bffe5e0898c59fa5040d375ebcfff37b5321d3c0cfd410987ebdc3964b5cfb599fa0b4b5344c4d6bd8fa637f77984c441778befa20e1b",
    "signer": "0x6D9Dc84F9aE52c2de7dC50bCcfd34c7497eD9b0D",
    "userId": "827366479"
  }
}