{
  "manageEntity": {
    "action": "Update",
    "entityId": "388523895",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierao2pilrzcdkjqutmworae5nea6ndjdbp5kaowwzemruyg53v5ajhq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":723058714}]}}}",
    "nonce": "0x516b37a1d5865981d16bb94bfdebcab6f35c6e39d3066b31938ffa22678d1ea8",
    "signature": "0x7c1d79dd9b39912cbb303b786e40f1b9036b3f66a14f47c0cbc099b5594df52711f5bc90c81a02880a6314311475ac3ce30181fa3a48d7ce94158ffc7886fbdf1b",
    "signer": "0x12Dd122e04eDA14fA483f2F178ea67E04fd312B9",
    "userId": "388523895"
  }
}