{
  "manageEntity": {
    "action": "Save",
    "entityId": "544484",
    "entityType": "Track",
    "nonce": "0xe9665ae6260f09af3b29b93ecbfb92ffadb05473617cb78c5680cceb25c9eaa4",
    "signature": "0x044948c900b49c42577290ef89d6407c704146351fb745d04647787372dac25c33e823024b9b747a11e4761402a4cbf5e243d81ea6eefaa9125f2bf62244b4ef1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}