{
  "manageEntity": {
    "action": "Save",
    "entityId": "615114",
    "entityType": "Track",
    "nonce": "0x086d34702a8d038673e4eacd615e15c07c4dc28994fdffa3b0fbf381f72e3af1",
    "signature": "0x77fba7d0d34b8a82f2377d898b083b8af44e3ddb153119f2c3f4d33262cb31163eee85062d3d4ada6535fdf3dc62f051cde753374c6e4465b6136824e510c1401b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}