{
  "manageEntity": {
    "action": "Save",
    "entityId": "1621026013",
    "entityType": "Track",
    "nonce": "0x45a1d9030548f5bf8c49502001cbcaae6c9a46f661dc17bfe9981d07e86f62ff",
    "signature": "0x34a8aa345726355cd4d24b1c9d21a8196432d715df0f932d4abb8608d56db28641a77949367ff7a9b2a46136aa653e9c7abe2fe85e2bc2373e8ef3cf1746f1bd1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}