{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xda58b485b566e078c167ea689cd15c11cc4a903b205cfb125ae4db25bc9d2ba1",
    "signature": "0x0566db690b326a709bcd723ac248ffa64fecb5b6fc540e484166ec797fe4408e08e8508575acab9c9a67c1b4567cd203072247861a3b60a5c0922105de6d38fe1b",
    "signer": "0x435cf294476b32E672CE5c2A0f51936ABF460c3d",
    "userId": "304116661"
  }
}