{
  "manageEntity": {
    "action": "Save",
    "entityId": "1830333785",
    "entityType": "Track",
    "nonce": "0xaf7a6927bc0d303d71c33f02d37ad658124744be7781cb3dee7e88a682a9f2c2",
    "signature": "0x121d235ce9913e98019418d0cb08b24674454af9e47ab687fb5e202368b7d99f0842010baf2a94e8812ed254665869f114d71b98d773f2708925892a087e19f21c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}