{
  "manageEntity": {
    "action": "Save",
    "entityId": "1075308",
    "entityType": "Track",
    "nonce": "0xf506008f109a9f6ad2578f0d211c518e5b30b8b8faa9b98ff15aa1bc74efdbea",
    "signature": "0xcc76870d3896ee0cf0d85bc082c176ce96554185c5f71fd3bd240f391057239b1a1a95c596f9e26f60e842ab7f3c2696e6f2106074af69612010790d030474471b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}