{
  "manageEntity": {
    "action": "Save",
    "entityId": "119927",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5eda35e9a583cff46596881ff2d565b7a36443065e561ce87364a683f0840f9f",
    "signature": "0x67b8a8bf30a84c98e0fbbeffb94efd09c875997378e6370c020a5cb9f551f58a0424a282b70224cf2e2b37a67555d660308716f8123405d9d3e562d4d27477631b",
    "signer": "0x354f479338B7F1593E5Ed2Bdb91a09c4bD12996C",
    "userId": "381478870"
  }
}