{
  "manageEntity": {
    "action": "Save",
    "entityId": "882612345",
    "entityType": "Track",
    "nonce": "0xf2f5d68266c7e69968261e87f59c060ba0bc08ed470ede75d9853a20228b5077",
    "signature": "0x027144787ee8a7791d2459104b59af2067b976d9a174b140fcc6616c6633aaac2ef6d490b91eef98198e4fc5a82ed37920e3314b4605064e20babeb438bf429e1c",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}