{
  "manageEntity": {
    "action": "Save",
    "entityId": "343492119",
    "entityType": "Track",
    "nonce": "0x8ac3eb22c0bb071530f9cd7f026ff90fda9aac264855f9ec53a56e8bf3c37b13",
    "signature": "0x3f9113a3ff4aa6f326e7879dc2ff8c5d22cc8f632d6f5a3ca981f9719af02bfa189efdbde1aa41bc1cfb458675abb327dc83a40ce80a52593af0c91dad240a1b1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}