{
  "manageEntity": {
    "action": "Save",
    "entityId": "2000660961",
    "entityType": "Track",
    "nonce": "0xb712be30e01615f07e358dd5cea24288a1a3bc1f98d6e706c5e96dace1d6df62",
    "signature": "0xcc9ad0deef5ae7d0369f6019eabf19bce7e4d2fba28fcd3e9e30d696a2b620b57ed931b8664708ac44909e202179f2858d41cb96335ba3f2dcb0877d5ad14a391c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}