{
  "manageEntity": {
    "action": "Save",
    "entityId": "209211",
    "entityType": "Track",
    "nonce": "0x5d32c418e97f71cc606a52d544dd696c2378d71b9c67f941b19f6b7ebe6ae194",
    "signature": "0xe411d37d51eddeccdf9466ed0f25b06b58921d1f126923a459d785057aa090906b67956c67bfa013c8e30eca3f50365f9a5716087bc763821c2b75b0fd942a591b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}