{
  "manageEntity": {
    "action": "Save",
    "entityId": "1930133747",
    "entityType": "Track",
    "nonce": "0x319d118c8d50a32468bb68d82091a63916f9299909c6b5aec0dba8b4e9f30290",
    "signature": "0x8d869665103c773ab1a3ec56ee5b66006ab91a09c01d8e5b32b19282e73ddb3b43f3b011ed94d6105360ee44f4296383af4b25a2e5466d01b1c20c9bfa034afe1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}