{
  "manageEntity": {
    "action": "Update",
    "entityId": "314250172",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x8108d9d4ab1feaac74d66b97b266bdfaf546895e50b4153dace3801da53bcff8",
    "signature": "0x33283a5de450e4411e94bbefa265f854fa2dc08008d30e9b26eaa6782cd0dc7d05ad7fe12451583dfae7052cc53126558a177d529fa6257c10ae7d7cdb90e5781b",
    "signer": "0x4E16F4cBFf1225d4967740a3782b8F0939067117",
    "userId": "314250172"
  }
}