{
  "manageEntity": {
    "action": "Save",
    "entityId": "1058956971",
    "entityType": "Track",
    "nonce": "0x0b7afdbe1e06f3baac164880db13c17fe05783595d1707c0490d1ff68d694f8c",
    "signature": "0xbe0d62dc7d854223bb8a6f3b92abcea17b76a344bd6dcb52497e85c73621e539692c608b20556262035df2dffad6cdfdf8059e8a50f6bd46b905eecf4b4a72e31c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}