{
  "manageEntity": {
    "action": "Update",
    "entityId": "259525313",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x03e0e6de3680ee426c936024bfd11af3c08f248a84fa94f0a05ac71a4456c16a",
    "signature": "0x3a762f44a9797bd10f30bc58da16b72ddcf60cdb9161da4160bcaea27158af94053b2a37284f7e80a1a99bdbc854191a11bdb7fcd4ee97558e24a06b37dfebb51c",
    "signer": "0x5312a5e50D15452d2d65007d600855021b9fD405",
    "userId": "259525313"
  }
}