{
  "manageEntity": {
    "action": "Save",
    "entityId": "1836746265",
    "entityType": "Track",
    "nonce": "0x5fa7960b9f1063fb80d4468353c855922242fa12de32a0ddc8c32ce81efb1c48",
    "signature": "0xb626239d1739cb54c253290494f11fd27927b52bef1b434d46cca7d7504a71107379d359536bd5dec8afc604220d0a842d0d405ff3858c30aed97a41167fc9261c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}