{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0dff2a5d16fbe28b8452ab5641ee52c4fb61421d4e0a9783eb895f322a2d5270",
    "signature": "0xb71e3aa81e789f77627b1288fdc0ae0ac6a80c066868d2a26d4ba8873244e6403e6813c35ca0530c876272f837fcccfc8553f162296e22cbb4c4c117096c5f5a1b",
    "signer": "0x840A7C042eD908bd611A9469655521b6978C9120",
    "userId": "439830191"
  }
}