{
  "manageEntity": {
    "action": "Save",
    "entityId": "1190113507",
    "entityType": "Track",
    "nonce": "0xf1d5b6b53f8a08f3d2ae9e48a2030589708401816efe51bf019b76f7068fccd2",
    "signature": "0x48bd5371df91e0c294f536c28758f42e8b381849d06c1afaece068e72a7fa0c22afe6b4de0e01577b72f8fa2aaffe4da0c484449a7a6312d2087ae09dbf1f7be1b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}