{
  "manageEntity": {
    "action": "Save",
    "entityId": "810135208",
    "entityType": "Track",
    "nonce": "0x55bb7bd49add4d6701082612bac53884c3bb6f0985920ec82a7d2f03590b1ca0",
    "signature": "0x5963b03fe3304baeb13fe9f875c9357ac958b44d59c0b94a3b25b2050bf971e32013b3c0a0d03d2295b2393882cca7681a60981c7321a3e7023423f8cf3827f51b",
    "signer": "0x8cf62510fac3cDDb31F4650442fcD7C5EE585625",
    "userId": "764635447"
  }
}