{
  "manageEntity": {
    "action": "Update",
    "entityId": "552753858",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x7ea18e5b42bbe007ee574e4ee742c0a25198f6125ebf4be32c3c88ffdbd6e6fb",
    "signature": "0xf57ea53f79dcd02070f60a484f12ea6f477657746689cc4b2643f1e641bcdc1867c6f72711bb57ac283af78667afc73324e88b7ee90330994aa34ef7efac54051b",
    "signer": "0x8E3A4E1A0d1Aa7628E0FDbc872062F921A449403",
    "userId": "552753858"
  }
}