{
  "manageEntity": {
    "action": "Save",
    "entityId": "776419",
    "entityType": "Track",
    "nonce": "0x6d2f86b48cf0a99fe5a49da8dcd61f1890575ebbc43c0cd44006ca76da4d592b",
    "signature": "0x0407710597562a3f4d934a9db8eb5db273686c139b0fc9f92d2c94e26627135769f539da47c12f1278339be56f12cb4a66f96da60644d864579e94247098fa041c",
    "signer": "0x9d2ec6a46a9c5b10e9f194E0d8365Fb4cD986916",
    "userId": "29050"
  }
}