{
  "manageEntity": {
    "action": "Save",
    "entityId": "59474887",
    "entityType": "Track",
    "nonce": "0x7e7df0593583a35dd119a1476010041c617ae02592a11950883db67c80bb69e4",
    "signature": "0xebfa42a4cdc67dfce9a65605597844eb468c7e9b5ae4eaeaa7f4b41e41b9a43442da27ab3397fb54ffeb851bcc87a162078b84192e018d6884ee730f206cc9361c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}