{
  "manageEntity": {
    "action": "Save",
    "entityId": "1404164294",
    "entityType": "Track",
    "nonce": "0xc042e75456c1ab6eafe234753b796ca2c391fe172eeb9a80f301ba9717ffb11d",
    "signature": "0x28422aeec570a1427de27f466d1fee0b53ed5fc76492f83c79557f67cec437d614e79d4b949b82e3d000a787a7b17fb31401941f5c1aed88619460a0100546e71c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}