{
  "manageEntity": {
    "action": "Update",
    "entityId": "393770418",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xbe0be2f094c8686d7da4e1652220f0c240fce4bdb3e57c649ef76274dc282382",
    "signature": "0xfac70602995c3695901c980d462ee254810824313bc76b7179536109726ae2123a8ce0354a103be2299003b9ee6d972eda1409dd6906b4f8d48def35960c0b361b",
    "signer": "0x3c0C477ba063bfcf1E1B5Bf8228bAA3D76B1df50",
    "userId": "393770418"
  }
}