{
  "manageEntity": {
    "action": "Save",
    "entityId": "1572178172",
    "entityType": "Track",
    "nonce": "1791633658638694848",
    "signature": "0x71fad5f7c20a94a0f12bbccfdaa47209687aa916f907a19819a9c289c553f369215eb804a5d2e9ad73161672fbf99650841d6bc265f58915ffd61be9ba9b645f1b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}