{
  "manageEntity": {
    "action": "Save",
    "entityId": "1167931639",
    "entityType": "Track",
    "nonce": "0x5399e7e0fef2a3af58c0789df634a8ccdf33d472e4c78dea58af32414ced8ba5",
    "signature": "0x1b9e91ff87c84d6b2211297ef569911d5dc2bf9e136990a2f9c91e8a4930660516b1377b47e7f50622719f8d0ea7f111883d0e86b952bbe5376852518ae736221c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}