{
  "manageEntity": {
    "action": "Save",
    "entityId": "725326",
    "entityType": "Track",
    "nonce": "0x67f3ecd2cb187f4f3879106b6636219ccb8861a382ab61fb430aa8c6d1bc4c9a",
    "signature": "0x6d7ff3fbede2ad119440fa8214aa9ced62ff293bc8cb82fbf93c8349f97f435d62c2a92fecc3c1d183e4ae42031ba075b55af4df5bbbba717afea5fa1bea2fce1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}