{
  "manageEntity": {
    "action": "Save",
    "entityId": "538024",
    "entityType": "Track",
    "nonce": "0x37aa68b5ca8d108c451c608f80faf04ae27cec32c23fb9cb059e3862e9d06b51",
    "signature": "0xea62a0d560af97df825077e6f544be03fdaa56cc20013318903ee0ee2a0a3a675a993dc2545a00573c6d7e3226af3b49276420eac809b7b3ca2654ce5a2d6e921c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}