{
  "manageEntity": {
    "action": "Save",
    "entityId": "1395263062",
    "entityType": "Track",
    "nonce": "0xe16115bdf66da3499f7e3f0f65e9a316c7d77f3c373ed73794a54ab0b6517c22",
    "signature": "0x1539b4de86e0dceeae01b6e88fc8eef9828f6078c3a8d3b2012946c9002af167127350aca117edb083a712ad612bb2a39007dc8d0189a95204ca8c44b4083e351c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}