{
  "manageEntity": {
    "action": "Save",
    "entityId": "1719400650",
    "entityType": "Track",
    "nonce": "0x257cc71dd70fd5b70735bb3fceb9fe4884e6c222fa9aff6b66db188cb433bdb8",
    "signature": "0xeee01c46afe84acc0d0a4723cc781b08651ba1005354daca944f1563ef68aca011329b51ffc37c091dbe61eb053af7d5b7a7c484717c3654d55a114fad7730d51c",
    "signer": "0x44c6c9974E4028ab550E0311F9A04Df023477958",
    "userId": "152450"
  }
}