{
  "manageEntity": {
    "action": "Save",
    "entityId": "1777189588",
    "entityType": "Track",
    "nonce": "0xae1dd576cfd54c707c7785e515122426a0c2253c6890f1090c445a0c6f1ad6d8",
    "signature": "0x0239aa622e826bacdd3bb65b0d7b5919872741c63dbc9f1b101129f37caa69b541e94cc2511df47a9afb7bce54677056b3a4c67e8c6208dd8896a67f11803e6f1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}