{
  "manageEntity": {
    "action": "Save",
    "entityId": "377367",
    "entityType": "Track",
    "nonce": "0x89bc838294ed9f8e6deb820c92c79e0199259cc254322e91c45057b23c53861a",
    "signature": "0x4bc37b54b1053d11604729f6eea963b0b9ecea51311de563fecbe88750d7b3585a1559772645e85ffae311dc10825835835f3fe71ddaab85c4bcbb62db0f974e1b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}