{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x32d584e768e83f4a018ebb0f959b305ab40e73ff423ac2e5d1eaad7310582f54",
    "signature": "0xa247c0dc7c5c4d73ce317809c411438521f9f7c095e29494a5d0705919cd1e295e3d14d1a06ef9ab6d20f79e4852b5d8e5dbc19ee872c6bb28cfd2c78b1b10ef1b",
    "signer": "0x64Fddb409ABc0Fb9EbD59e1Da561aF32e48D7ffF",
    "userId": "837486331"
  }
}