{
  "manageEntity": {
    "action": "Save",
    "entityId": "234916976",
    "entityType": "Track",
    "nonce": "0xd7fb6a9b3a73ff3e7ebc876f16f66a66ef3e5e12a349b0bac6bd9533bd843c18",
    "signature": "0xc4f549c238bacc47fc8778dc1debb5f2bc84753e16be61768cfd395fa9380d710c6da108546adcb32dd0d4d962d775e60f1e31a1f09e1a6654acea3388314c3e1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}