{
  "manageEntity": {
    "action": "Save",
    "entityId": "1071474",
    "entityType": "Track",
    "nonce": "0x46ce5303c5e547992aa958afdf5d45f02e5bd523ccd803d6f61f150f2ba6e874",
    "signature": "0x3240f8db565d92e6650100d198a16ae84d616613a1e8580903b98a6ce331b7200fd9962a974e28bec63dc4a963f5270d1018c9a1b0671cc1be68f893896434ea1b",
    "signer": "0x03b70C3825d7b9e568C53C89a738061d855d0dec",
    "userId": "578849678"
  }
}