{
  "manageEntity": {
    "action": "Save",
    "entityId": "1248544640",
    "entityType": "Track",
    "nonce": "0xb0c0f313527f9d8796b5a97630da08b822659a63bd431de25b916fd61152d363",
    "signature": "0xcb63747c616d51f4e41554d251e2f07ee5c9be3e26601e9b8b04190a0fa0c10e5e9236b7f3b516cc1036eb9928fdb14e56444c4bf6d33c5c6f47cc668fd3cb5d1b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}