{
  "manageEntity": {
    "action": "Save",
    "entityId": "1817537018",
    "entityType": "Track",
    "nonce": "0xedfa8030266ddb4dd91e1f165149e150d06ad4da62e2959bb4ce0bbd78d88ef7",
    "signature": "0x65c77610bdb518876ae32812fd1aab8328e3479e9c34326143c77752434c0de5741987ba9693c4c4b6cceb76587a26c4c0241838d89ff3bb45019bbdc441e27e1b",
    "signer": "0xD07A680d4F48bA7Cc076c23f40870AccBbad1987",
    "userId": "16411799"
  }
}