{
  "manageEntity": {
    "action": "Save",
    "entityId": "1959533535",
    "entityType": "Track",
    "nonce": "0xb2d2cb8eaa81ff779a2f1420bf7dba78d5c34897af3a01e66922f2f598165ced",
    "signature": "0x3a98cb15018c510319d242df5cb712429ef07ebc67f44052adcd3c5db88cf6567611879a245bd277f10a3f1d48ee24a9856104de0e98238d603224c68fe3c75a1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}