{
  "manageEntity": {
    "action": "Save",
    "entityId": "1410791290",
    "entityType": "Track",
    "nonce": "0x5fc5c5b10d957fd2bd480957f1c9bf03166c1ef3a28d3edb54f6352d6faa8cf2",
    "signature": "0xcbbc91728b209b82d2fa5a6d0bdea6bd9c8680da2fb51511e311b97fde8e28332d10fa33b59798ac4cbc9ca51dba89fc69d68720ca8f3aaaea45e620b14750701b",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}