{
  "manageEntity": {
    "action": "Save",
    "entityId": "370077067",
    "entityType": "Track",
    "nonce": "0x24b2ab35a1d476c1dc58175d075cd170b2dd574b098cfae1a6a572f7fed4a04e",
    "signature": "0xe98e1f114a8d4ec61a719b5f93d1a69e433cf99a9c829618ec88eab6fa9e80fe41fd557cede196f0d78cab79d15aa7b7a2f0869dd3881b2a7ff6693737ed51261b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}