{
  "manageEntity": {
    "action": "Save",
    "entityId": "606958699",
    "entityType": "Track",
    "nonce": "0x634480200f2160af99d224fdf75c1a4eb6e92539262552a272eccdc7a28bfad2",
    "signature": "0x43bf1268d9dcb6c9d0cf72416ed745dcc13ea03b55c6d840e77967140bc1c556232386170f6eb5bdc516c46266d5da3b3dc30a1f64c878166df058c3fa57c74c1c",
    "signer": "0x97eAfE883FbF33a8b75f6f37440caFE5CC452d3f",
    "userId": "849776474"
  }
}