{
  "manageEntity": {
    "action": "Update",
    "entityId": "520341854",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xd75076e203183e74ad08e524d4af1192e40d775d120a2aeafbea54a1893d20d9",
    "signature": "0x3cf74086f1106c50658590444dbda50d3c2f7a114c5bf825ba0e08d425c202de252f4e780444f6a76bcc5bfecad877c8fe54a211aaeeca25bd9dcf72042e4bb91c",
    "signer": "0x7BF745Ab0aE164aD1b31611967641E3A638e9E55",
    "userId": "520341854"
  }
}