{
  "manageEntity": {
    "action": "Save",
    "entityId": "1057644667",
    "entityType": "Track",
    "nonce": "0x72c5268599191fe4d40793500d095997e97373cf2c5ea840fe25238509f7f5de",
    "signature": "0x1a36caeb083024dfe123910bc0b9ee03d217bffdef23830d042321d3476b7d091e6fb3856947d24ad0c2478a11c16050c7f17a1e922a62e5a93a20a16733c9fa1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}