{
  "manageEntity": {
    "action": "Save",
    "entityId": "1777418930",
    "entityType": "Track",
    "nonce": "0xbd7ea0b242f6ecf5b96e93c24812948afdf654a9bd8587212a2408844b4fae28",
    "signature": "0x4d7b770d873784317bb2874bd43f14af91052c354643f40b49331a6871fbd13b71513cb47290764d8d72ac14c1c43e877d1db6d99dbb901e3fb5f2ae11e6c7d71b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}