{
  "manageEntity": {
    "action": "Save",
    "entityId": "293476",
    "entityType": "Track",
    "nonce": "0x44143d11f5c27deff6bc465aed134817bacbc6eec6eb55aa52879b014d7c29de",
    "signature": "0x4b583f0ad1a0af77897693723f0de1981f62640aeb7e702b22cba323d991d66a4448d4ff1da1cead7bf3bce567dfe2e271ff11e8c37258a7dd48d7674ff33bc01c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}