{
  "manageEntity": {
    "action": "Save",
    "entityId": "493155",
    "entityType": "Track",
    "nonce": "0x14ceed02407fb4a9070c47c1c2eb779a6115420b10cfe79a6b4036b62601f399",
    "signature": "0x98a10cc459306a4872ad48b742fe03bb6f5b33db70f68f4071330223d91a5e567984596de50875984b70fb59fe7512bba4b8b5e984ae02f7b296500f28a1c9d11b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}