{
  "manageEntity": {
    "action": "Save",
    "entityId": "820673471",
    "entityType": "Track",
    "nonce": "0xe946e0272684dcb89cbf1de89a446ca1a2f2c25fdc6e4d14add8db45642f80cf",
    "signature": "0x6f31e8b2cdfc7aace2f228bd748524a062a05d1e9cc71d6ead0dc88affbb8fc93cc59889243b37fc224e9934190d473881fafd981cc64c69e40cf0bd6d4deaac1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}