{
  "manageEntity": {
    "action": "Save",
    "entityId": "1337086234",
    "entityType": "Track",
    "nonce": "0x4170c5dc82657a48bb7e3df3b7024265689e7f3c7b0381308917c604cf734807",
    "signature": "0xb3e105551fabcd7afc35d777c035c07d694ac1029303ac2ad25d9d4c68d2e6c4645c2a797c30dfee6df5ca7e92ba7834b32dd550a9b2d84b43d3a9f3926466871c",
    "signer": "0xE795526f098824a87a94C79d58a4299b51b20a3c",
    "userId": "837713671"
  }
}