{
  "manageEntity": {
    "action": "Save",
    "entityId": "1626942290",
    "entityType": "Track",
    "nonce": "0x63e6b611c38adbc277aadde7daa5a5b9b2ac9b4fecb23d3021aa588a8fa859d9",
    "signature": "0x74c4cbd68405c568590aa17f490e349eb19fb0cb89cf30cb765632fd3be894f15a2bd9cfa835f675e215fb3c70222464dc81806e272ed5fcc55366e0396f48841b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}