{
  "manageEntity": {
    "action": "Save",
    "entityId": "540260",
    "entityType": "Track",
    "nonce": "0xd49199c66d52d409ea23d7eb1c27d9fa701536d72c2af4dcb920944c78598d5b",
    "signature": "0x80f4526dbf357cf8c4173edcedb890348c5edb39f0c093a1808eb1f744f9e7e7534970089036ec0b23082e5eacf720e2a8f8d8fe9cafe702fcbcbeeec0f00e731c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}