{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x333a52266f85cb1fe4c5ad7c53578380f274e4f3da305717375adeee8cacdd84",
    "signature": "0x2b7a8b92dc21d61774195749ff10af8a294683463f9b6ae41cd99b098b5eb717165b117fe78cb1d4f93c8317051a375f14b84aafe2903f1cb5ae4faade814f8e1b",
    "signer": "0xBA76F8188C3B73B4282D2eeBC45E9D1090AB8dF5",
    "userId": "92469189"
  }
}