{
  "manageEntity": {
    "action": "Save",
    "entityId": "779920000",
    "entityType": "Track",
    "nonce": "0x1cd71f5d19547394fcc54d7ac8fe3f910239615b5491492db5b8f682f3fccc07",
    "signature": "0xb0bd07cc2af54212dadd9091de761680a433d01735709c007fde8deb2a28f30d5834b032069f829b1ccc45db0932ec2163d0d9b1371a6fcb7e66be10f0aff7541c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}