{
  "manageEntity": {
    "action": "Update",
    "entityId": "721987098",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x01cfe748612910dd74c132413beeadf30b54451943a5bafbf514e91bda948c21",
    "signature": "0x06115493631180fa3a589faa83fae7fa06abf407930aef16f52ef40da525f99414e8de749976d84f8e1a04a89ac796781de624792cda2fe4472d6b03c3d91a311c",
    "signer": "0x4c2B6D597D288449d9F215489E66f1cCe1c85B8F",
    "userId": "721987098"
  }
}