{
  "manageEntity": {
    "action": "Save",
    "entityId": "330245523",
    "entityType": "Track",
    "nonce": "0x0ee178d7d9d08fef38831b20d751dfeeca505e880331c8ea266a85027b663c78",
    "signature": "0x9bc00656af3566dfa406b832965f8ccc65d8edf6810039b9d4e0fdce6f47fa516b4bc5399420a74a8022843039924dbd473fd87851866874b9a903f934f5a03c1b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}