{
  "manageEntity": {
    "action": "Save",
    "entityId": "1260958789",
    "entityType": "Track",
    "nonce": "0xdccd54318e15974a7e4e073e4372ecfa990a5c4c2a2eb577c872ca3a12f044c7",
    "signature": "0x8f9f77898de86674d997ba2c3d326e07bfbbecc0f81540b38ec76dc0bb977f9a14f8aaa1a4bcdc7eeab71e000d73aaf4db7f97c2e7ae1a9eb6e3a684748535631b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}