{
  "manageEntity": {
    "action": "Save",
    "entityId": "237362",
    "entityType": "Track",
    "nonce": "0x3c15dd52ba4bd95452763f79a1e22908a54372631991145a996c1e43162b2094",
    "signature": "0xa44d02829cb477bd8b49f9880b535ed2b0b41b6889ae1a279c407b1e4b3ee1331f08678452fd3749dbc72210900eca963887bcca3b5433f9caa0fc6dc7f7f1b61c",
    "signer": "0x2f890F488c7DE6221893B82B90bea73E2304cE3E",
    "userId": "344578316"
  }
}