{
  "manageEntity": {
    "action": "Save",
    "entityId": "595328108",
    "entityType": "Track",
    "nonce": "0x514264c1b95b4238d3a4d6f8714235f9bff19cc35af0490faf601888350456fc",
    "signature": "0x2f0961530345930266da4d75f80e5c378c6375deb420c01a1b70b5a9f967e2f700e5fbf245d7a94beafb9a2ecbedfa423b9fe59cd92d99278105764ce99639ae1c",
    "signer": "0x4e6d3FF79Aade15659fd1C0307E366A2993b55B4",
    "userId": "108860"
  }
}