{
  "manageEntity": {
    "action": "Save",
    "entityId": "1512607872",
    "entityType": "Track",
    "nonce": "0xd8ad467738408febbd4f175513c1e3f88acb2481d5a8fc71de694aefc0e2b803",
    "signature": "0x387a6847802773e2ef7efbafaaa588f24dc1863137803fe68e724e11646bbf1614d0735e26f73cade868ead6ce727926dc673a2a9f63d2ff4d3b7bbe9fa837551c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}