{
  "manageEntity": {
    "action": "Update",
    "entityId": "393770418",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x8200b4238fae7506f44192d6c12d795219114dc261362d2555c3697bbf1d43ff",
    "signature": "0x448a4175f6e9d1f6539292f82fe5a7baf11571280888577796f3c2766f2d58904c770896c4e41b7244b0d826e0b3775bbe07d7168ac5e9ebb8f1a88ae148a3411c",
    "signer": "0x3c0C477ba063bfcf1E1B5Bf8228bAA3D76B1df50",
    "userId": "393770418"
  }
}