{
  "manageEntity": {
    "action": "Save",
    "entityId": "217385316",
    "entityType": "Track",
    "nonce": "0x31235d0fe89ed243c5fb70773ec8b6bf5534d3e831c54458686956dcea89ecf9",
    "signature": "0x6eef059aa119ebdfc11117d6dd8fd9d26822669d40af329c3b15da683e04e3a167201c2b5d87c00670d739999ee4a3f9637ac4c2c8c477e4f272421bdb77559e1b",
    "signer": "0x3D472a01Cb831ac594835ac6038A4346E2A22B94",
    "userId": "327343"
  }
}