{
  "manageEntity": {
    "action": "Save",
    "entityId": "207622",
    "entityType": "Track",
    "nonce": "0x455a6d1b2c3d12669026e3d5c3475976054e0dfbc48a603d9f85b9f773bf3cb8",
    "signature": "0x78cf5bafb7cacd3c43944cf2fe0258697d5c26c084b97bb343ee6905b96de3fd557007ff98039b48c7bba96c6547e3d609845dd1d5534462b90d70bec49752d71b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}