{
  "manageEntity": {
    "action": "Save",
    "entityId": "1323786880",
    "entityType": "Track",
    "nonce": "0x9ac9f0aeb02b5d4717c024a890bef30af63fa2f48690bd4e6022c43e2521ab1d",
    "signature": "0xeae2d909d812ccf38d9a2c66d5e1378845f69e554d76472b01574a103edc75e33cb29c23a3ad7dbcfee9e1c96bae2c540aa6260c1a8a773db91ca1607061c3101c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}