{
  "manageEntity": {
    "action": "Save",
    "entityId": "944756722",
    "entityType": "Track",
    "nonce": "0xb89d95ebb58d120b6f4c73e61b2078a1bdce69cba3134b70d1fa4f8936993513",
    "signature": "0xf89bddd57b150fa0228e438c91d1fd2c192a99bcc65bcf0f09aefe1dd79844392765da2a4a7039f2369a13007bed7c63ccc61ae7411d22c1447a32b4a62b365d1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}