{
  "manageEntity": {
    "action": "Save",
    "entityId": "2040679079",
    "entityType": "Track",
    "nonce": "0xb8c95749b3a9a485654652f80e91da3ae9e8e39a39895824909504b9a5c3102c",
    "signature": "0x8a52bec6e9f4facef2eee57ef8b546b2b7d18e4a9dfb30ebd117940f3fe0510a5e900116e2aa5259486947e0a53234942593a251be319398272b86e398138df81b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}