{
  "manageEntity": {
    "action": "Save",
    "entityId": "29357275",
    "entityType": "Track",
    "nonce": "0xabfbb8690759a0a916f09952aaf5a3a84ffec83495663880fc80ed27ecaec8d3",
    "signature": "0xd48742b6ae5511fa400648261c3848ac16b9fba9f8b590b07110cb24de2139b042b49165ea2a56f3ffefe5fc5cc49383a5fa4c73911d401445eed05951f469f01b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}