{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xda56a54c68521bcedb0e8ea9544bbaf752855774410a6a55ae5b294201abb538",
    "signature": "0xa9f48183dbce5884e522f18e69a0e9c2192f7e27d8041accaac997c270d8ed8d6a6100742ddeb6fd3a18be13da726fd1eed1c0a9f50eabcd4be89295c9d618ef1c",
    "signer": "0x250BA5492e75e8e9a4D09C6cDE8D09f1B7dfA3d8",
    "userId": "831474008"
  }
}