{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3299624460eeacdc8d38876a76782df0eeec150db00a49803f2d648923d7df7e",
    "signature": "0x2126afeaca903201bf8598e47aa4a26a123bb27f10a4cc1f5569972ccabba81d4c82aa3dc692ce705775f286a5e1facc59cc1edb794cdf88e3036cbe5cb423691c",
    "signer": "0x7E915FA0e857276481e34ca82B4A88B53a13ED15",
    "userId": "396044630"
  }
}