{
  "manageEntity": {
    "action": "Update",
    "entityId": "543615130",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x428b22a52c68d0ba4dacff2871dee4a69fdcbb78634423983658705b3adc772d",
    "signature": "0xa74717e9ddc9af43a9279ced97001df86562dd981af5ceb4662b5dfa5518783a3f34d67034c90236d6ab89fa18429946a8b886a83c5d8ea22e7816ac984dd7521c",
    "signer": "0x7E946720e712419058CaBB2D982F088f33824DE6",
    "userId": "543615130"
  }
}