{
  "manageEntity": {
    "action": "Save",
    "entityId": "2116020476",
    "entityType": "Track",
    "nonce": "0xc1f84d76ff48fac38e8bf22afe7b9719bff33303f9c352ebc249913a0f5a42e7",
    "signature": "0x5921a0a8d7deab2a233ea8a72e1965d7167d2a5d75de1149e12a7644b53ba36f01bd8692b27b2a179cee436ae4ca6ecc7c97881d309f46271045c5cc27f636141c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}