{
  "manageEntity": {
    "action": "Save",
    "entityId": "272710081",
    "entityType": "Track",
    "nonce": "0x37881d9e02453d08783587c597750f6e221bce4d2532e96eec4f12eff448fa44",
    "signature": "0xafae06a01d39743c8483ba6d5023034265f5656bf33b59a1cc5167669099f1af47b25f476823469156d987901376b76ce3cd03c606432fbe1f0ab5dcd032790f1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}