{
  "manageEntity": {
    "action": "Update",
    "entityId": "257893262",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xb0b8a03c649270ada5b4c770d8b293d097bdc1bc330a81593c6115152013db98",
    "signature": "0x1ff6c7860e693fe63013ee5fa272cf100afad7402787f3cde4fcd8c2e5848fef20ed535a8ec8ca638a3ab141e30232780c9e9f218bb19dc42a306b6ff6ea08bb1c",
    "signer": "0x8fC311242F8bABA107e153Fa6BDc59e412be7A61",
    "userId": "257893262"
  }
}