{
  "manageEntity": {
    "action": "Update",
    "entityId": "643976014",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xca7ff4782cf58baf8e429c79419d36d49ccbd045f15cd52e98d3bde899465853",
    "signature": "0x5aaa9fe542949dcca0667b4d01a32afd9c10135de46cc1428a39b935af4b301676df65c34df4ec6062ee277b654dbe918a84acad375cc9ab47faf338737a57171c",
    "signer": "0x434E6E903F887d1123e2415651292ED71aC170Eb",
    "userId": "643976014"
  }
}