{
  "manageEntity": {
    "action": "Save",
    "entityId": "140811471",
    "entityType": "Track",
    "nonce": "0xcd25ec771f23dfb702fcc3e6d27b3112f37ff092707f7b83a0e6cc00b8ab2a1b",
    "signature": "0xb5f7555589769c1e4e6976a8eb0027478bfee3760ef8b5a61485047ad5e927c65c3020ef06ef42f500809da4a19ae2ef94cab294a49bbd69e488a57e578dc08c1b",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}