{
  "manageEntity": {
    "action": "Save",
    "entityId": "1962715608",
    "entityType": "Track",
    "nonce": "0x6c5946bcc59b450eb43a6186ec0784c5fa855dec354a1fd280a34cf940514605",
    "signature": "0xe6b93f1401e78e85dccd2152112d4d11ad16308c8b8d2f3a4fc73aeb2a12814442a7dff757988f1e1db13aa9a63b8a1bb6850d45fc749a0f46db5484181e2e701c",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}