{
  "manageEntity": {
    "action": "Save",
    "entityId": "1699472558",
    "entityType": "Track",
    "nonce": "0x1a9174a1ed6edf057e1f72a887b8e4491ec626f77eb14ff68378254501bbed7f",
    "signature": "0xc9364c1a672b143703fc14c7c9e550b4d28cebb918cf7090aa24c99f59d8dd334c3cadd9fc897279b0836be8087ee4e7c303dba27b6f8a743ae1032ddac466c81c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}