{
  "manageEntity": {
    "action": "Update",
    "entityId": "473911971",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x131f1cc7930ec3322a9ebeeb1aaf43b2f85c4cbd8064b0ad38315e11bab314f5",
    "signature": "0xdd9c593a84ab0bf560bf299c2ba3269b398b4e969135aa762a94ed737f169d6766761050bd53b84b8167f5b4e92f909508cddfe89a62ed677012453567b9477e1b",
    "signer": "0xfffF643204D053ae5bFC296Aa20F15313084C719",
    "userId": "473911971"
  }
}