{
  "manageEntity": {
    "action": "Save",
    "entityId": "956857320",
    "entityType": "Track",
    "nonce": "0xeac4c8ab6a5aa7666ac678adc214016420f7eecc60813d775ab3817266a78bc9",
    "signature": "0xac67f1cf9d9c72807b1058f76598b2147cf24cd7a54b843a417895e77995aa7a78a055fa51d09162943584f5b5993942a689fe58065ecf02f8ac0e0df8101df11b",
    "signer": "0x11EFeB5E02d1E5FF95b12f694953DC15ACEc8bbB",
    "userId": "191130508"
  }
}