{
  "manageEntity": {
    "action": "Save",
    "entityId": "993199",
    "entityType": "Track",
    "nonce": "0x6707967908d29b54d009ca7247eb72303ca92ef324e2501d73bec7fdf8828aed",
    "signature": "0x3244ac703ea11b575d71989009142d359a9722b2e6f5258fc22566fa1314b8a54ec52f872251ca869cbfd4dfbca31ce9f651b11c518b5da62290d275b02f0f9b1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}