{
  "manageEntity": {
    "action": "Save",
    "entityId": "584680579",
    "entityType": "Track",
    "nonce": "0x4b97d96f49e0abb91632fb3b558d62c9fbf56f1ef2187b98d5bbf9968f8f73cc",
    "signature": "0x7b8de73a0ca149820862c0d39ccf2bb2b69ff004244bea0d31d2eccc70b0bead68023845e1f5d835865bc2e8fa55747ea87d0d9730ef6981d23fd7e3f110eea71b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}