{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x40ad49f135b9aeb3ef892f514a3678162b2e712393eed392107322ba46ed6968",
    "signature": "0xcd7f88726de903ff6fc0c81a8247c2935e6621f6d7912497fc3217bbe3e2e94e64cb0cbe0d834aa361dca5f0911d415becfb56501b357afad378e5ca2a72390e1c",
    "signer": "0xaC0e591e6FDE4113579B09Ca370F0aC7aF69C08e",
    "userId": "963788362"
  }
}