{
  "manageEntity": {
    "action": "Save",
    "entityId": "493812664",
    "entityType": "Track",
    "nonce": "0x189855552395d6532e610d257bb98483773011460afd10931ad2c8f6993ccb95",
    "signature": "0x1a7ef742cc8295d4da126687ff275f64149a0a33da23c23a9c769358ebd11bfb1a6425f7abaa4d7528556c3f56c7a0201e8357e94160ef38dbe83e7b81e9574a1b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}