{
  "manageEntity": {
    "action": "Save",
    "entityId": "1130217722",
    "entityType": "Track",
    "nonce": "0x8ef4b47367999e7d5a525f6b02a7c7632303748622aaa1eb5a759d8a553587b1",
    "signature": "0x330c79db90e1fe84e9d4b375bcc15ec2de1e31d0adb3a8b30079f6e89e1ced310ebcb4d0946c9cfea5f7e48d19f61b6580214748ad6f602c7e428fa6fd4204b31b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}