{
  "manageEntity": {
    "action": "Save",
    "entityId": "867162311",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x02e6d88b7bb4d1594456cb74b478d51ab235e4d14c76e5343617488cafbe9605",
    "signature": "0x9368f54ddc75ec6ff2c63da1b3eceee0db4e00bbec9bdb686fd16702c340dd7c1a54d84a02671a55c8d035e717135c094f15c7ed334a56281d2e77a08ee687c31b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}