{
  "manageEntity": {
    "action": "Save",
    "entityId": "1048960698",
    "entityType": "Track",
    "nonce": "0x24cf0cd246bc1ff13fbd84df723ec0d4e4bacd59b8f33b6b28d68a5dbcef8025",
    "signature": "0x4694ee5905188932f86dc3f3d83cddb541c448c05c5dcf173983269386e0705f2387890deb6305df65bff553aa55fd89e96018f1f1cd32e6f84d6320ed7c76121c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}