{
  "manageEntity": {
    "action": "Save",
    "entityId": "562972081",
    "entityType": "Track",
    "nonce": "0x3545eefba48e6f705e2d70e2e79612f43dbf24ed04f78f0b8bed0620277916be",
    "signature": "0x0364863630d59b10a04190a207211a08679d40d4d5502f0099370dbe3bef9dcc15c367629070ae76a1b02d50fe127c1425f10d1adb992004e1138b0af9a6b98b1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}