{
  "manageEntity": {
    "action": "Save",
    "entityId": "2019328557",
    "entityType": "Track",
    "nonce": "0xb018795e84ce7f044c94cb487432efff38b6d3217e476ea8e0d2b50114196d60",
    "signature": "0x7429c81df6e446f551ad4ab15ad44695b1530b23c99c61e41f5554b91d9a304f79ae7a126b1d2ec1cf69795f80baa95dfef8e8424384f46c1e4e35d62e0149701c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}