{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x30d8745c97d20b48fadf57d9e271911738c472c74c48772d3e883384cb7223fc",
    "signature": "0x39b7e81529db3ec3c573372957f8b5d3c6e10f67bb9f551a5a0c2b237e53910309002e8e94da0ce9babd70eccbc94070eb9028771821e38f49cf564acdcbe8581c",
    "signer": "0x6c633CD9B83bb095AF6F4fbd3085e5758746A846",
    "userId": "77176962"
  }
}