{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x993f37cb1c3f9794d50d3a6d3f179beaf5adb6f880927343350fd19d955e9713",
    "signature": "0x44b56e84afd595b029a0454e48f25d9113eacb05aa403dfc1d565e7de8244da95b675efca72ebcee28ed2abe2338e5d8b443144cdaf5a17ad7141e0f18769c7e1c",
    "signer": "0x5e9dAd681B2D46bBe369ec87B0FB5660F8A585d7",
    "userId": "808075447"
  }
}