{
  "manageEntity": {
    "action": "Save",
    "entityId": "1192039533",
    "entityType": "Track",
    "nonce": "0x07b22ed93d48b4bdd305cd88f1736725819e486bc14487236a6f47c3f392d225",
    "signature": "0x0f973a18e3266a6393ce15d63ad872a1c9bf237b3aa42b31a7a86309a170065253dda6ec476e5a454a40426a31a92fa8573711473457bff49675ae68deb161da1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}