{
  "manageEntity": {
    "action": "Save",
    "entityId": "312154554",
    "entityType": "Track",
    "nonce": "0x9fa1fa1c739105cf1164aae34e5759876ffe10a16a3def5f7421e902b18bde9a",
    "signature": "0xbe5f43530a2de0c458a98845fa61761fb1f32acae8f449918412c9864d0f8efb01e66b348cf0c30e3a4ed377fbc84088760c7894780a7cd8d0193aaf57876b7c1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}