{
  "manageEntity": {
    "action": "Update",
    "entityId": "512455047",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera6ypsdlrq6e442odxogchgv5odndnid2qymtun7kpwr2ileq4veha\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":748254241}]}}}",
    "nonce": "0xd8fdde8724e4fa6d2c94ddc597289b8060a5541f388e435cfeb709226a7b9965",
    "signature": "0x528aa977695aaa7e7e163af1a9e22a3cba118bd940464f27e8cf2037fc96f560741414489ac5baf1561d040551b6d0655dff7ea140b0b329d44ea87ab9c90b621c",
    "signer": "0x42A77074ca485a8d1E966f6BA3315bF823A7A7Aa",
    "userId": "512455047"
  }
}