{
  "manageEntity": {
    "action": "Save",
    "entityId": "929049790",
    "entityType": "Track",
    "nonce": "0xc00b9736bf86024c64ec6098330f5a1da926c4ae9bdee9af1633bf9c6215a287",
    "signature": "0xe2c1e25827974b52f5d8810aab5204cc1c0687d9e13e1f883c6f4eeae333d94b5347529fafc86a77c9f0a62b952895926a86d99d4581787785aa0141a98f85a51b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}