{
  "manageEntity": {
    "action": "Save",
    "entityId": "1462644783",
    "entityType": "Track",
    "nonce": "0x03023406c6951ae7ed14c844921f8d963cf85371a3032f37dcc89fa0bbed82cd",
    "signature": "0xb7f98bf852e9afe08a2a63b8d67efa8525ae4c7a86d6efc2de17ee2e9cace4fc05a18566ef96ca6515e6804aec2903e7ecd63403b0fccbde0f8eeccbde7e7b941c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}