{
  "manageEntity": {
    "action": "Save",
    "entityId": "1539065318",
    "entityType": "Track",
    "nonce": "0x24fd711364bf5de52fcc7327daff772ccdf682b734c93c8428dbb2b9c6271a81",
    "signature": "0xec1e120b43225ee2c3f762e5577e245285c22280c0139073c5da8539e474ce8074cf48e073ea2f118f188f0d872135a5307db89a8a2cbee7960d7bffe2a7a7d31c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}