{
  "manageEntity": {
    "action": "Save",
    "entityId": "1104268",
    "entityType": "Track",
    "nonce": "0x3650d84494b7eb4677411d9e52ec8837f2c6dea4a926dc782c50d4bf64ecbe22",
    "signature": "0x50a7b37954f61c5c005904ef84d0b8ef4c67a2b3608cd867d362944dc32de06115d378d39d61f09f0836a35495faf900ff5aad391d81001ab2e83f8dbc15a0981c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}