{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2fe41ebd9790b1d1f4df3f3aada8f851d9bcd01db502dba9958fbdcd4a750986",
    "signature": "0x4a9d69ee4abf0cf592cd29b48713670d81d27e52ad38cfcd1fc71ad4ebfa8e9d47e4588b874a473995f26ab7f3e055395365d996dec2fba96c2ddcb45d1bc6271c",
    "signer": "0x7Bc117EE1abf935D4Cc8c77fE47FDA0bd02b56F0",
    "userId": "751460097"
  }
}