{
  "manageEntity": {
    "action": "Save",
    "entityId": "1252083684",
    "entityType": "Track",
    "nonce": "0x7e74f3f3811b852e3b1496eda8db343de3a1cd4c98e5466bb1dd13b7385e9088",
    "signature": "0x4d6a8d7f9dad7ba154b7ea28ff99fec3007a7e630d789df192b13b108bc5c7ac2187cbb2f98902ac63a5f092a262e19a0a55d1e0e0eaf2d3a08eb63957a803201b",
    "signer": "0x6AAB6EaEa3f7F15750b649C269b0391dcB19dEeb",
    "userId": "92019297"
  }
}