{
  "manageEntity": {
    "action": "Save",
    "entityId": "377484024",
    "entityType": "Track",
    "nonce": "0xb58486df2836c7dd24e834fc34aae2086804a21b7a41e023b485205980589dc4",
    "signature": "0x4f38de403bafb33cb6dbaa852e663121b10b2ba7ce0c1fd35293be3ceb38a67448ab3a44afe8ac8dce655ff77f0f5c3a95a4234abaa35aa3f6dfffa520f8073f1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}