{
  "manageEntity": {
    "action": "Update",
    "entityId": "500784600",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x84c4a5a9d1a7dfd10b152482e15fe9c469cd5d2df403bf375a187523d864c9e4",
    "signature": "0x6f84697ff7c56e59a3742bcd2c0cb5c5076b97ed047a341e8c3aa7f8a176c95836cd68026c221164e6b79525184598c0537c7916d49b46d137e3e1d5b5330c591b",
    "signer": "0x1d9F7D75b7dB31c5d4D499acB963BD3B1321B100",
    "userId": "500784600"
  }
}