{
  "manageEntity": {
    "action": "Save",
    "entityId": "392285677",
    "entityType": "Track",
    "nonce": "0x60396d70e24e7ee23449ee9fe7d4e2e0c47f1af30b72a0ac89eac1350687d565",
    "signature": "0xb8cb4434c4d688ede282959acd18f2c918302eb4553acbb3ced4d375e033ba6f50dcdbb3b63942b891be9a028a944c81585f4b9f3f35ce13546e139d7bcd104f1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}