{
  "manageEntity": {
    "action": "Save",
    "entityId": "1735953227",
    "entityType": "Track",
    "nonce": "0x65acb877e3ffeae583c90d7d29e930ca696a1b21f08286733e545ec585b29c2f",
    "signature": "0xc018633fadb4c3b520eef8254afb4ea3c3210ce969ec1566ab09241a536969ef58bc166b6665fdbeb98e7732edc8fe6300f481d7679994f6cc4b2ba3af7e62141c",
    "signer": "0x4dafC3e774A1033C5604372f17ccBDcE545f478D",
    "userId": "889450527"
  }
}