{
  "manageEntity": {
    "action": "Save",
    "entityId": "179799518",
    "entityType": "Track",
    "nonce": "0xf5d3b61cc787c49885cde4f575f4d5ff90f8b40b75cd4f8b698f817680269903",
    "signature": "0xa3d9084ad918ffcb7259ad0ed26834f27a7a6a8a9e880e92a4362842839b6f2c462b006cf76387c3e4cc8e3c2ec5703de8a3a8632ec4f05263e22cbe6c67d5671c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}