{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x941abdf99c67d78e8756958d40b1c00dbda0232cd0fd02295563bd552ace23b4",
    "signature": "0x6b03e9c2808936a93fed78ff032dbc745bcd68c530c0ab83ce2357896c7dd25e22baa4da6e54a2bd338894c7cd61de2982e68bf1604a64ceb9d0d2ecfb405cfa1b",
    "signer": "0xdF7b97B84dE9f20D3209339266363cb001F2902f",
    "userId": "504270527"
  }
}