{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcedeaa530acc364acbd060a244abdfbe5885f559ffc4786ae102529e05fc4488",
    "signature": "0x19db2af5049943d9e973c1990da83a718711ee04d14502fa33d2d83b9662c03c1636fbfb96786be0bd04efaf06c6283bb7626b2962dce778f649ca837d564a911b",
    "signer": "0x5e726906F4D78E7A3A35216322A456744c5aFC76",
    "userId": "869546451"
  }
}