{
  "manageEntity": {
    "action": "Save",
    "entityId": "941232312",
    "entityType": "Track",
    "nonce": "0x75575caf3e6fd10930cb84cbfeca8ca4aad922451cc53ba2daf32cfb67481e2c",
    "signature": "0x7c8074227109be581ad53b3b632aaa3bbad458d54d1232bd6ce0d6fa6563731f4a0e28db85501064c93896d40571aaf6319f1f0713d1aa2d8a991e21e0067e661c",
    "signer": "0x9742BFcda3E998678A9f313149c705E80899d5c5",
    "userId": "350957781"
  }
}