{
  "manageEntity": {
    "action": "Save",
    "entityId": "1429519834",
    "entityType": "Track",
    "nonce": "0x2bad2df0b0051123cfb34d0736a83162d17aad1dcdb70ca6e67d5babd5b31fb5",
    "signature": "0x58d26de83fca114849358fb773ea806c985d70f063a0e064364a527e7efa93427aaa497aae2feec8a6b2dc56fd457c56d0410e9b9d3b3b7d35c57a2b1e3d338f1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}