{
  "manageEntity": {
    "action": "Save",
    "entityId": "954479",
    "entityType": "Track",
    "nonce": "0xcc7bdb686a9bd78ac566593e509abe160392dc936a2182e070d663a3d52597ca",
    "signature": "0xcca98a830bb6cf5bdc6fc695368151d5e8446b8e5e2b7faee72bed60c72ff82e423d4df7fbafbfc31ec8aaa02e1735508cbef9f805d7e85efffcce0e12e4d2571b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}