{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5ed437e6ca5e67c886a61fb8a40ce85590251ee51f4fd7aa1465640ea8ad6664",
    "signature": "0x37efd20eea0b306496ab12268ba660c78d92be74f8326119bdf843d0b0b0f8bd0d8141a36382baec2da4cdeedd77287ee2274adcb4285a24b3f8c38ad3d547251b",
    "signer": "0x31B4D977629cB393A929ee0776f205dE884F16c1",
    "userId": "494760779"
  }
}