{
  "manageEntity": {
    "action": "Save",
    "entityId": "552705407",
    "entityType": "Track",
    "nonce": "0x575db02f9ab4421219710841186a18a5b0f2111a5797288d9dd07319b9c684de",
    "signature": "0x5cf3a6f18b2bdaa9fc37ef9eb5ad552d7e5cfe68f008755fce7252992f3644902fd8f1f10a81bdfd76eca5f6d6a201f0ebf87971f36eda1c1465395b7aaddcf71b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}