{
  "manageEntity": {
    "action": "Save",
    "entityId": "123916",
    "entityType": "Track",
    "nonce": "0xf08deea54a9482c7352f0791c4160ccd95a436f084051b5279d0f4eb46437655",
    "signature": "0x5b550e4a756ec945a33523dbefd1800f91163822289e5091f8caf548067f2d4e359c99e9b9805151000489426503ae4e53e653eb1481028c4ea53dea7274af191b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}