{
  "manageEntity": {
    "action": "Save",
    "entityId": "1432891123",
    "entityType": "Track",
    "nonce": "0x6df339329380433c99ff0ce7c2255c8b07462e0ee61aefd6803a299ccec4f632",
    "signature": "0x85f663c8d4909c3d598d5d884bace66233fd9566c1022296667ef4b5d826161e6f644a9d8dace33454959a7fc9f33d476ee7dc65aa21f777fe23474fab05b9b71c",
    "signer": "0xdA0eFB0e7b973C487c12501759aDb23012CB5248",
    "userId": "178070"
  }
}