{
  "manageEntity": {
    "action": "Save",
    "entityId": "998088421",
    "entityType": "Track",
    "nonce": "0x5a3899e8f2885e7872ccc3e4b810b0f5bdfb0aba9e5c86f309ed20da85f48eaf",
    "signature": "0x0fa5a5486e30dd29515d9cd7bef142869d887f479e89a6cc7df7462378eed4a839e58d09ed13d32b6d906112ad1d72ca3b58695ec08b6836d517f2773ab4b8ec1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}