{
  "manageEntity": {
    "action": "Save",
    "entityId": "1910810418",
    "entityType": "Track",
    "nonce": "1785857638537483440",
    "signature": "0x58f3f89256227897460ad43974a4a57acc8bb4d279f85277618a21e30e8d17a676afb38b6f9329fad0bfb727dd743a5220c8d77d444a05f482498e52732e27ec1b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}