{
  "manageEntity": {
    "action": "Save",
    "entityId": "352853017",
    "entityType": "Track",
    "nonce": "0xff145d927da28d6610a067e30580be7976e97e9bbcd03a350085adf1ce98eb55",
    "signature": "0x7b74fdea8bbfe5c8df7ef5aec1488fa827d51e415b5a7e8d3b63054a9981e5eb0af5c3f776b1402b4254bbe58649909c8126238e2710c90faff083bcd3824f701c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}