{
  "manageEntity": {
    "action": "Save",
    "entityId": "932147",
    "entityType": "Track",
    "nonce": "0xec9073922035cead98a4fec32c3f98052269da9c06620c6bf3b810035502ac48",
    "signature": "0x078e2e07abf7f910c14dbe068ddf36cc035645bdf2033165338071e5912d6c253e2c8a6ecebaf227164df544475e156b0717aad21da80338af90c21c4e9842f11c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}