{
  "manageEntity": {
    "action": "Save",
    "entityId": "1472887271",
    "entityType": "Track",
    "nonce": "0xda81e46c45214158c255f3784cc28212f087b711ab2b603fa134483cb62e35f2",
    "signature": "0xe427eea8bf642efae80411f45906352c0eed3ad013fad04349b7136ad02b5c5a477684350693e293ac16b65a1a4fa674b2e3ad41327c8aaeb59ee2de4e4dc3b51b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}