{
  "manageEntity": {
    "action": "Save",
    "entityId": "1409378559",
    "entityType": "Track",
    "nonce": "0x0fad9225923aad41ddbc48366f60ffc3ec9737aaca603ba3f4b84a34457fcb4a",
    "signature": "0xc7fb549d4d91b165a3fa5fdc6ded558d2f581062784660e43c974cc4d3a821fb0da9e3a445e16bd5b10443edad119a2caaa58e0d86a51bade004a8ede6e8a8381c",
    "signer": "0x722b43224Dbc7d6931b3C690696EF03933374bff",
    "userId": "772126389"
  }
}