{
  "manageEntity": {
    "action": "Save",
    "entityId": "277152544",
    "entityType": "Track",
    "nonce": "0x2e4cd21fb714ab63b79dd7a0187d9fcf68639833b44003ca96c5de29fe0b2bdd",
    "signature": "0x75b117b9e05ecb9d0146fe25048c8569de0c50c7819b5f8b5341badfa8428a5619ad68536cad61b3d9492da7a282508a3747b37ef1f41e620156ff853f8a46381b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}