{
  "manageEntity": {
    "action": "Update",
    "entityId": "552753858",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x3f001d9296e71f16885bab045a8125eeb3a83152957eb5779127b5d3f5563e79",
    "signature": "0xeba0fed7092d7549c8d602a43def569a892545ed5832cf92afc067ef6c61398e20c3c760eaa1c6060e653742af1023af5d2e686a7aae5d9c1eb3fc4129305c6a1c",
    "signer": "0x8E3A4E1A0d1Aa7628E0FDbc872062F921A449403",
    "userId": "552753858"
  }
}