{
  "manageEntity": {
    "action": "Save",
    "entityId": "1392803543",
    "entityType": "Track",
    "nonce": "0xd02ea85684fd9c7dc3797e32ad61dd763c82676f6ae695c20f2c7b235280524a",
    "signature": "0xbfd475cf4abbe61a4dffeae7a1e8f7dec77015f7ec3d7ccf128cb32e4e814d8e1896f661c9140931d30a5f2b4d4385b28afc3d2075ffae2b83f48ec7528bdc741c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}