{
  "manageEntity": {
    "action": "Save",
    "entityId": "1116838631",
    "entityType": "Track",
    "nonce": "0xe7a23b40e47596668656d018a2cb2ff8cd9cb232b8d717a51ac2d9c1eab862cf",
    "signature": "0x53e7ddc78d943dc517ac3e6cf5d597cac1a84a2a43fc2b19ffb803785b1ad6a77ed81c71b01fd9e1da14c668dd8c60abba0b95bd8fa499fedb36b19232d22a411b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}