{
  "manageEntity": {
    "action": "Update",
    "entityId": "755908561",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xca949848e72c0cab2582b297ddea005b81bccc1347a0124d17f1f6f917dc2f0b",
    "signature": "0xfc9b3a4cce4a6c9fd31df154990e0789202b364d7893705528ed636eddd602cc62c9eba05664b71734613261110cd031f2ba7d4274ccbb41c37250e1f1c4b7b01c",
    "signer": "0xb5F851B72783F7778ea81B66bB1B7EaFbbb74bE1",
    "userId": "755908561"
  }
}