{
  "manageEntity": {
    "action": "Save",
    "entityId": "1580426020",
    "entityType": "Track",
    "nonce": "0xbbf6b481b566bfeca0c3acc8f4e2863588131c1c45c3c63b89383b8c6d839ada",
    "signature": "0x65dcc74f510cba3691668d2c4f0a6e775da34585e215fb9541a8f41d3af3a12f257fbd3fb0ff2494c7453ef8a708466085ce5e8f465da035a1c604e6f70a49d91b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}