{
  "manageEntity": {
    "action": "Save",
    "entityId": "711363",
    "entityType": "Track",
    "nonce": "0x5da66efd6b8c3ea1e26b444e7b3d9da2514f4adf66da8f440c1549375ced2843",
    "signature": "0x6cbea31e37ecb6e33597a7b15beb892f9a9ddcf39bf02400c3e41ecc72677760303053cf881f1d86b1aa74b7c2d526519356575f9e8c312a514cc5a7a259f71d1c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}