{
  "manageEntity": {
    "action": "Save",
    "entityId": "944023757",
    "entityType": "Track",
    "nonce": "0x9d18c576d8c47be037b5bbbbe2f5f3d7fb12b207509543488ec44c882ee35864",
    "signature": "0x055cf2e529b33f0df7e863fed0f82d6edd64672bfb7e3c5908b5dee69193e0db727c14fbda003f9a200468b026c5af1f3ce3ff9db42f6ea6e1bd03062d592adc1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}