{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x62492f805edc53b4b0029e2869e24b50576ca7ce910675a33b8820305f3c79fc",
    "signature": "0x7baaee57bc78bbb5e572cb178d0da00bf737b4f89df1b7d078bb4fee99598b1e52071c7f656e87d1f6d55fcf0f4824b2cf3d0bf439467f60429184bca6f1da6a1c",
    "signer": "0xcbEc1668C594D4917a6aF46Ef5D118D92B3b9a5f",
    "userId": "13235162"
  }
}