{
  "manageEntity": {
    "action": "Update",
    "entityId": "393279285",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x523488966d690afa3e7ac4fe38e559f5430aaced3ff7ee87960c6809a87eccd5",
    "signature": "0x19d309748b2d356952a639431635b864341ecf219bb51f8c43f4d9709978336168be54667cc3d0df5313f39117db4a8c4603ea1abca12f3f53e57dc3b8f34e9d1b",
    "signer": "0x7851719067C51aB77192b66F1DE2448b67646061",
    "userId": "393279285"
  }
}