{
  "manageEntity": {
    "action": "Save",
    "entityId": "126768",
    "entityType": "Track",
    "nonce": "0xd8fbeace136909b7874cb73cdde8254e972bbf779bac5eacd33e3d7725736f69",
    "signature": "0x145c13ffadd9d9ce7dbc434cf3b4cc6b30ade2fb274e0ac8c2d09d11976db804319d194a82d8c8edb3a58974395e01837b9006538a99ed66de31b2eaa35af10f1b",
    "signer": "0xa8E11aa224d2579f5cbdb912866bCE84Eb10f9dD",
    "userId": "951616224"
  }
}