{
  "manageEntity": {
    "action": "Save",
    "entityId": "1250367365",
    "entityType": "Track",
    "nonce": "0x5c4432202ba102d84a6551d1f2a159af41e1c3afaf9086e6f30efd5ee42d97ce",
    "signature": "0x88e4f9f57d6eab44a7e877b3131eae138e14b94d6660d191bb09ac0881271d8f2faa8b58f08f62b87a3ea7bdea87709097db3dd2a6b9e16fb7b4888932208c831b",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}