{
  "manageEntity": {
    "action": "Save",
    "entityId": "550569",
    "entityType": "Track",
    "nonce": "0x3baf26e331fb9832da26de1761d96a0c4cb4227e571ef87b8b9fa21b3c159d11",
    "signature": "0x19e1a7a4c8e6cba783131b392f7fc02d96b76a5e3a5c4c908fd2c948604a393b5e07072373a450b06a5f1a18260c7d861892c8df45a0d286836fe55d8c94e9cd1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}