{
  "manageEntity": {
    "action": "Update",
    "entityId": "757352381",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x4f097c552cfdf47f619667fdd22ec1ff945b396301ea57ab44c50e7653e58150",
    "signature": "0x2622817293d77099cea316bc2f1f458683bd50668fa051ee83c4fabc9b11a7a651f8556711cec579fd79f51e4742d8d24f78ef84754a580d8d60670e6c1aa1331c",
    "signer": "0x7cd25FB30C9BeaF3A4ee8191d57bB6C598D317CD",
    "userId": "757352381"
  }
}