{
  "manageEntity": {
    "action": "Save",
    "entityId": "1385236526",
    "entityType": "Track",
    "nonce": "0xb2824356a3839320d647c3a170817ec1e5a1aab8c62182bef4d3487a492e138e",
    "signature": "0xd85d4083bc7683b66871b14a8c48fcd99840bb196cc705ac3deb25361945aaee34f7869fba9c291d798e2eca277e056f700c72551a9747029eb4bdac68519a6b1c",
    "signer": "0x4dafC3e774A1033C5604372f17ccBDcE545f478D",
    "userId": "889450527"
  }
}