{
  "manageEntity": {
    "action": "Save",
    "entityId": "1748893637",
    "entityType": "Track",
    "nonce": "0xab9191eb6cac757eb337594164f573123a2c17dc095c0d75e9c27ff25d559ac9",
    "signature": "0x46a14cc5d9cfcebe9668f36bb9406d3605c8e6b66a2c105fc773a3c601c53c410613d4d66b810cd58404480072a70c2e64b3fffb9942cadc37cfabfaa971304c1b",
    "signer": "0x1eC7AF6347b7579b6C0FB9E96622F020bF643FEE",
    "userId": "795470961"
  }
}