{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb3a61155b62c164d5edf1a60c3fcfb6fb5ca13acdc056dd9f9cfc9756fd3e56c",
    "signature": "0x2af57a61e23413e37f3b16ff6e279e56d2aadb274f6ac03a33563b21155db3da3b11bc02d7f4150c35ae3ac8cc5dca6f27683046bbc73ec7e7b487cb1962a0d11c",
    "signer": "0xe2Ce42f7ACc16Bd2Eb0753236b6216a6a38bBfd1",
    "userId": "38921479"
  }
}