{
  "manageEntity": {
    "action": "Save",
    "entityId": "1517608681",
    "entityType": "Track",
    "nonce": "0x8a651418bae3b8871fbc7524014951e0f7157450931cf895adb580e486981df9",
    "signature": "0xeec982f643cbebb4b613706d357c14ce353e89161fe38bba9aa5d8091cc72855796e8064288b3837bd28baf793be0653a0b4b5bdde85547d160c2c68802b76cf1b",
    "signer": "0xD07A680d4F48bA7Cc076c23f40870AccBbad1987",
    "userId": "16411799"
  }
}