{
  "manageEntity": {
    "action": "Update",
    "entityId": "750115329",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xc5ccf80abcea644a7a963dbb31359c70bc268990d1b882ca7b022170da42873d",
    "signature": "0xb3eb9a49a3a863ade32167ad97d55a328b0fd287eb0731d47e46938abf5a553b41afb917b0361051dd309ec73dd33bf5bf4616f721c457772a22d64755614e141b",
    "signer": "0x4A8Be1fa2c734E857a920E358BbbC23ce64E8525",
    "userId": "750115329"
  }
}