{
  "manageEntity": {
    "action": "Save",
    "entityId": "1651549674",
    "entityType": "Track",
    "nonce": "0x0a73c71366f9d098cf87b84ac7045ce17aab8cb294765fc09b4002492b4a03dd",
    "signature": "0xc981ab7735fb4bf0d07d216e49a38a441e86bd6c46027ea2c9379cc25804c737714e97312dceba14b2f9197b13b069164c2cffd020bcf23caa617eab13ca60741c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}