{
  "manageEntity": {
    "action": "Save",
    "entityId": "2096042747",
    "entityType": "Track",
    "nonce": "0xc5b7d24bbcca446082df29730ee1e45d05b32b5d6790fd791de9d9b479fffe01",
    "signature": "0x5762372d8c25e1132e57bdd0adb8078c8075855faf6a9540b3c0741cdedccf5c30bbd10869bd4a37db8564c4c013f1f8d16d53f92f159cd582cdb667062358941c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}