{
  "manageEntity": {
    "action": "Save",
    "entityId": "1725497478",
    "entityType": "Track",
    "nonce": "0x77ab1d38975a9ece4f11645437d2dd01deb56322ad16d5e526de919962096741",
    "signature": "0x071f3480639477a5088e6adac6c2ab5c11e4cc983ff1e5208b66c8e89603118b333a5b6e5b137c2e038df66b0b614daaabfe98e1e008e232d5b4c974f390a9771c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}