{
  "manageEntity": {
    "action": "Save",
    "entityId": "1265853948",
    "entityType": "Track",
    "nonce": "0x661f92e85a4ecfb5dea13027c8d3ab8631a41b70c41f9067b94c273afd386fd7",
    "signature": "0x68cee54882a9ec648bd79d3ea030b92cc23d89fbbeb22adc9b77e9ad37c8ae50716f90ed06eaeeb48fcc2b36e7d6f6d1beea210105f521b7c6af93550e2cd5a81c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}