{
  "manageEntity": {
    "action": "Save",
    "entityId": "961198",
    "entityType": "Track",
    "nonce": "0xf2d1745cbad1415a5b85e6c77f29de1e7a68fd95d68e40b0f9d6b222cac67b0c",
    "signature": "0x4c59008c4f28849fee589ea2d7db6967cfac99b44848af13fbc010e7207b81ec7e72327f54459cabae653599d337ac71fc4bbd2264791fddbbcbf12d6a62c5cf1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}