{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8999b8e94f61890dbc958aadb7500cfbbe329720fbe131aff412161ef740f16a",
    "signature": "0xd0551905d0b2b84a36d695c419e06fd6efaaf5cb1c5a3140f8e6336c1158e25b384597eb45209765b8c36acba0ec5aad698f6c0964a6667ab474ea45b1553d211b",
    "signer": "0x9976A5bDB93F69653188778fe013ed45ca0c2Ab1",
    "userId": "85051708"
  }
}