{
  "manageEntity": {
    "action": "Save",
    "entityId": "1485653932",
    "entityType": "Track",
    "nonce": "0x451249f4756d4f94e5ee5e4622dd7396388c087c33f240bdc85bf23ebef37c40",
    "signature": "0x5c78ee837ffe0cb04360808f8aa2d08bbb52888a5fa2e42635a203939efa61374266d111511d94c4d41236918c4dc2fa3bbf207a04f6dbd8c0d1983cf3af3d9a1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}