{
  "manageEntity": {
    "action": "Save",
    "entityId": "1211158609",
    "entityType": "Track",
    "nonce": "0x25b6666d1196315bafcd8d2554c614345f8852f5500e3c86178cdabc008f5391",
    "signature": "0x1bef8ca2bba3e809b89939aa8fa552aff72da64701eb467c93738bf72419d2744ddd951e6ac7926b480839c31f40bf1c391b022506214bf14afe06fb330e90991c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}