{
  "manageEntity": {
    "action": "Save",
    "entityId": "809052",
    "entityType": "Track",
    "nonce": "0xb901a0e71ece5fa0652ff73237fed7c2eb1b425f89bf2a4a16e12f6f0a553d33",
    "signature": "0xb3c362bddb8612ebf98aa6379419f05fe168c52843e45cc369cab233b2f0893e2af947ce3d655d9fa26422a4c0ef36826568e28d93da1cdaddbfeecdd80afe691b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}