{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5d0cb20f336b84ae478c4922d644eca8cdafc96cabccbcbf47420e004a1b962d",
    "signature": "0x7ab5add3e2c795c7daa3704c876d05c7e20069a7adef051d0ee31b72c880753051fcc5ab06980e8c80bc84717ba62765f9a74c02a97058458877041edd8a2af11b",
    "signer": "0xa4Ae03e32d881b4a91e97a5934E7343BAfD3f9bf",
    "userId": "912031262"
  }
}