{
  "manageEntity": {
    "action": "Save",
    "entityId": "107474296",
    "entityType": "Track",
    "nonce": "0xb99f8acb417c7f86175c4cc543d57082a112b883c157dbabd2f0b77c97a06741",
    "signature": "0xb1ab11eba2831b548f6732e24dd11fef301cc28a5e5d0d9b59dac2da489397a67fdc29df653d4b61d8770734e0af83c948f8b5db0a6fe526a2443db5ab9f7b951b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}