{
  "manageEntity": {
    "action": "Save",
    "entityId": "1378179653",
    "entityType": "Track",
    "nonce": "0xf68a1a8e78f27b1dc8b96c85797e27ecb99b67a7ade5ad3a3bb160f4f5050e01",
    "signature": "0x6d70eeb92dc091613b7c86b1805c80bf601f719f3b8b9f9a490373ea5a0efa212b7518034d5b82bb66218bf6628abc254968da4241f425543681db92f3c7a3af1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}