{
  "manageEntity": {
    "action": "Update",
    "entityId": "310135321",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x42e840f0ab4ac95423189202b2d633f1a208abf86efe7d000981b25909726231",
    "signature": "0x3b6cf60b85ae9b63f2a7d9e1c1a0ba391eeffd794f411d1b357d9bc023203afd10b1b863ba44984395a78ad6a8db09a67c0ca53eff18f8b8b40dd69d2094eb351c",
    "signer": "0xa52113b8f25d73acd11a98D38EA19ebe55d4a771",
    "userId": "310135321"
  }
}