{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa45cacd223b041337700712adb7167e5d92ca015b7b01b14bf14286359949e1e",
    "signature": "0xb7be084e16b1c4ea14e92282fb468725bf0cc799b8d60d60547e210810d9eed52337825c5b8efb975b0ad1fecfb749957f3fc1a65f0054bc885a3c5e566323ff1b",
    "signer": "0x2aEfd63D93E143ED5DF78f99fe3DebDEc6d51088",
    "userId": "466712647"
  }
}