{
  "manageEntity": {
    "action": "Update",
    "entityId": "503581396",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x9e81128046c70ef7381a6e1ef24eb8832aaa99735c01652ee67c13dc8bd33445",
    "signature": "0x4238b9a492d52076eb468859a6f5f30eb06871173c1e84f8833a80bd36a8bbe4683e6098a1125499e65f86a83c093cb6e3584c8c2ea76c2ba0ae60fc0bf535531b",
    "signer": "0x763598BE8002ad38104619C47D39c9352959F365",
    "userId": "503581396"
  }
}