{
  "manageEntity": {
    "action": "Save",
    "entityId": "910472446",
    "entityType": "Track",
    "nonce": "0xc030d1441de7bf949a98581d32edce52bbb1f9ab7b89b76dbe483f182630d2d3",
    "signature": "0x25d7c4a7b29a07020b165f734ac337933f8807c957f9bf5a321ac568aa3cc8566884d77a23cbdc30ebe9c9113e7e1d626f6a1ad1ba84f5ba08cc8adb63590c271c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}