{
  "manageEntity": {
    "action": "Save",
    "entityId": "561640",
    "entityType": "Track",
    "nonce": "0xedfc394deb3a43cdd02dda33c5996f8673a08d1f44a6ff879d18ba9dfc122697",
    "signature": "0xb4b6f24a7b7aa806ea91fe5fd3c175ab933787755f82e0fb4dd0fd7123b9581f7e426c0408a23ca0ad1021a607f56578daf99508a088ce7e95799aed5e9a75c21b",
    "signer": "0x0E6Ef8dF2F401D8918d603B82ef321D94A721556",
    "userId": "648802251"
  }
}