{
  "manageEntity": {
    "action": "Save",
    "entityId": "595328108",
    "entityType": "Track",
    "nonce": "0xb0e2b7589bc9034a347d3acaa8d7da32aaea4a2fa3ce61365d2c5689aba166c9",
    "signature": "0x8e24c3e506dc9534687603d90172a91367b8cd704b680aec6bfd867dbaed23695782d54ef01e6799755d8589e24d231f7a2bd4474966e416d1e89a4c8762fbce1c",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}