{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2b53e3244ed3eadf6c86a682fa29c89fdc2e0d53ff78208e8f89f367f5531541",
    "signature": "0xb8c163cefedc33239e097b0d0f3fd556a18abaa817fe2cc3b38a10ddc78303a708d8b0daa61e222da47832a1f713fbcc214a569f8eef2c37077c69de97d46cce1b",
    "signer": "0xd5Ec6Dd96990D5BFfC9f13A05EB6DF120A1235d0",
    "userId": "570105610"
  }
}