{
  "manageEntity": {
    "action": "Save",
    "entityId": "1251049303",
    "entityType": "Track",
    "nonce": "0xf583ef97e07a4601fa130f3df9958bf2fc01fccadbc995ed0bf01286fb5a7ce9",
    "signature": "0x7ef16e771c66ea5cb1c5a304fd7d88ac253b4650552221a59b4c283f47142b701086c80a57016e93cf4f48af4cad436e3429d787ecac49c9a6669f2cd0b1edac1c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}