{
  "manageEntity": {
    "action": "Save",
    "entityId": "1114153",
    "entityType": "Track",
    "nonce": "0x9858264a171eadeeed6137e65a0f557287f33ca0f47a6e7f02e02fc9e2191d82",
    "signature": "0x9e9c31e375c055828662a2ad927713ddf15364f13c10b18107be3622b53aff437c7343f51365dcddce827acc31570516655f4841be6fa0abf46684ebc6b698231b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}