{
  "manageEntity": {
    "action": "Save",
    "entityId": "686755301",
    "entityType": "Track",
    "nonce": "0x448630cfbf95d06b63896d27096ecaab54d5e1e6447eb38fab81309004612f37",
    "signature": "0x83f8051fd0043d086cfe42dda03787195243fd288fbaf1c2331e66cb0a1ad7d568b1ce40f7efd2d243356de17d454162a619724799588ba066696ae6a827cc011c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}