{
  "manageEntity": {
    "action": "Save",
    "entityId": "323917353",
    "entityType": "Track",
    "nonce": "0x85f34b2a487d4c877127ed193e1b3f4a3ce49d129103e3f22602f3b45798e65f",
    "signature": "0xbf8e342866b452a688522f367df2d3d4ec8f502991caa866411d52743574475d0c7298f041126bb01bac0cde25f870fb0e880b56553e73033b9152ba1bd1ee4f1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}