{
  "manageEntity": {
    "action": "Update",
    "entityId": "876735576",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x3454ec8bc03ff72d8ebe970fee65a99e81f1e5e9a2f14ada3c4bafa5a0018085",
    "signature": "0x3e717eb94948fd2c46501e66ea2e9ee3cfaa6dd8beb8e66829a5c2405310b1ea48f0449b2d9c2143b7c576538333b6b57363aa04de0e05dad09fc1cece1ed2e01c",
    "signer": "0x1A03dB80e576Ab52a1E1852ba81778ae8f8f3f95",
    "userId": "876735576"
  }
}