{
  "manageEntity": {
    "action": "Save",
    "entityId": "515008838",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x95d710ca9c8fcd11124b092768db5b7d6f9547363701b3eb08327d1fffe44fc7",
    "signature": "0x7f8ba6edbd87be7d385034d75c6d634708de87db3e1bf2a8c73d284cdcac9c263cdbbb9dc1e42276527a4b601f4c05bc85e21789fd3a0d350a01a7fa682f94301c",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}