{
  "manageEntity": {
    "action": "Save",
    "entityId": "1923812567",
    "entityType": "Track",
    "nonce": "0x8475965a4a54a2dd4aac12d09ba68ba25f06fb99fc1b24d882a34c3159c20829",
    "signature": "0xb16796de5d53ff63b57d657794dc625800b62a73fda30a27733acd560c1ab3e450118f322a338e8b18de330fe0ca41c140e748a67d88cb89f923b5f440b19d961c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}