{
  "manageEntity": {
    "action": "Save",
    "entityId": "1761447376",
    "entityType": "Track",
    "nonce": "0x0a7b990aad8182d14b7195adecdce8b81746bd6a86e2b9fde12e9c30230d48c5",
    "signature": "0x790cb24b2add899450c4baed499c5e5f80b285282a516521379fa2e890e62e444b87c72b9f31f23db2cd504d59a365a6754f613004b606c6f04678f0ced984301b",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}