{
  "manageEntity": {
    "action": "Save",
    "entityId": "1631718020",
    "entityType": "Track",
    "nonce": "0x32662ed741cbc961eff58f9e454498bed16bf318f8f29fee4f203ec84755f66c",
    "signature": "0x340a9ad79266b8309a2beaf420ab8f3b61f8d9b91196dcf9c5787e223f17047e159e29c70cd1d4568b42fb4ed7cdbcda7acfdc7dd589f7a8552464c9a06fea7a1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}