{
  "manageEntity": {
    "action": "Save",
    "entityId": "1768912075",
    "entityType": "Track",
    "nonce": "0xa3d786853879d6fbd7cbca4cb0f26073684b3e8b52695a81c6e1ead4fc88a426",
    "signature": "0xb437fd9438f3b86d6b4c975e603a91142fe57068cb12a5b8db3ea844a0c32b48247691ab4070becd86f63dc6c17de1cacfef2acf4625adfc1574789a4c96698b1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}