{
  "manageEntity": {
    "action": "Update",
    "entityId": "391958413",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xf7e640594ba5bfe973d2fbc941f569a90944c81af7726acd8d3ff4400f842c9e",
    "signature": "0xa1998a2480cc5670504ca975dd1442d5ca729b4206e067c5c8d74fa4a1324d86495efc30f7cdf3fd76fe924b529b8769abf1e7d654b70f551e4672f30b59d1701b",
    "signer": "0xC6dBaE270CF394A0696329679170C67b3d06AbFB",
    "userId": "391958413"
  }
}