{
  "manageEntity": {
    "action": "Save",
    "entityId": "12318174",
    "entityType": "Track",
    "nonce": "0xfff6a3c2bd60830420d7e87d9749470a9ca13d4c5a1b361d579e3478a874482b",
    "signature": "0xec986601fa9e0f795993911466e6bc5deda5434e05db457494f53e691964fe814c7a922d651f4aae344706c2411f36073af5604b3c6af1bec9d2832de765b93f1b",
    "signer": "0xF31D5C491eEdac6bA26f32166d05C65D3F02e7bF",
    "userId": "18932"
  }
}