{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6e513e8cfe70d4407ec1868e53b749cb2232bb77d901defa02dc7b19e2763f2b",
    "signature": "0x2bae0086b70c3edc8edb3485aaf4014b30b7fa3a1c37fd43f690ef955f34e6151fad9d882c1a084f8f7e587d541c245cfda474e342683fe270322ca64ab465171b",
    "signer": "0x987a793382b79111b8FCb88647107B0f09dc69B2",
    "userId": "965105961"
  }
}