{
  "manageEntity": {
    "action": "Save",
    "entityId": "244430896",
    "entityType": "Track",
    "nonce": "0xdcff3b26a2b87da9d858b437fc580b5fdb3c9813567a664fb47185c868830fb8",
    "signature": "0xf29d21fab3e3a86763eceaabcb04ddddb784416adf82eede130d059b95211cbe6da1d30dd1f59ded933fd56bbb41731922dacf31431acbf055c0022e260fc1371b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}