{
  "manageEntity": {
    "action": "Update",
    "entityId": "303393509",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x6edd67f39ca5e844d95c8097f08031f7a2a5d9fdcdd66aed7b250a36314ed752",
    "signature": "0x65894126508af4dad795719f1d32ecbbbfb525fc8058c465091bcc48d4bdd9573f97d8a073ce4b9bb0f0d849be8494fdc28d5e0b85dafbed9d0727b5094e069e1c",
    "signer": "0x4E073b7076371ff6Bf848d0B4abA785B38B5ff1E",
    "userId": "303393509"
  }
}