{
  "manageEntity": {
    "action": "Save",
    "entityId": "297234387",
    "entityType": "Track",
    "nonce": "0x01eac702be996bf66695a5a6d8ee558af44baa0d2ceb0f767a9d721c7de65cc0",
    "signature": "0xe2ac7e9bda076b68fd3361aa62622ab337ef62d72cae881d0956042e7ab792283e181d18b142709a11cacb30def6477f54dd0a9d75119bd4e79d338c4a759fd11b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}