{
  "manageEntity": {
    "action": "Save",
    "entityId": "1530736971",
    "entityType": "Track",
    "nonce": "0x939b58910156d9bea8190a290a9722b72509aa11fb4c46cbad62a0a6a875be15",
    "signature": "0x1a8fff1f3c397dac1f7c945627800582b2b6fb62b73006d26cfcbcfb157947b504f1ffcea24ed9e8a58d97d7f0d054dc9e9d9a8458de13d87ef07e94be56920d1b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}