{
  "manageEntity": {
    "action": "Save",
    "entityId": "1810863870",
    "entityType": "Track",
    "nonce": "0x69bba60916ad978ce0028ace65a8cf4bd4f411d5353f78088b45016319e9ba92",
    "signature": "0x90fb0ec857914357eac00526c239236a0dd70386ce118b2fe7d4c56e5e2e6633463db1d0063a227a6f6dc3c63a9227b61ecbe92cba514060bf72a20a3a6f80991c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}