{
  "manageEntity": {
    "action": "Update",
    "entityId": "789409949",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x74f4d46880e106e5786ce9478903fe8bfb73f357edaa8f065ecf14d36d0862af",
    "signature": "0x5276cb575c4824b81da41c7da1e8c043f7b0517e98642f1c0d2563d8ba05b4db2028ae5b71d8e86f22a0b2aafe6e48eed032d77bc66f8316e5016bd660a3da0d1b",
    "signer": "0x1350Fb660d27De7Af2914fd50cf0baBF74553150",
    "userId": "789409949"
  }
}