{
  "manageEntity": {
    "action": "Save",
    "entityId": "833568398",
    "entityType": "Track",
    "nonce": "0xb30c30a4ef33b3dc34d1838f418862da92eaabfe316a3b26379f61dc6c52ab46",
    "signature": "0xc7842736e42a695d10061d4bc26a3e68dbc6b126f738a49c4642d2e5ba55f97e49673f82777eafbc05cfc3200c3a3690f8651d2b8e6912fce4dc5846e83016191c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}