{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x29c194ad93e05a6819150db7f5aabce45dde5f98fe86664477ccc5afd873d195",
    "signature": "0x5252222b8d162a507f905464c8a5b1486a2852699b708546e8ee290914fe1008273545a8dece64e80b887264d0b19f5459a8afb8f951dce0d3d26fd26d1862fc1b",
    "signer": "0x5D2FcEB6995f043Da8377A1C642D3AF87aA3a2b4",
    "userId": "186322118"
  }
}