{
  "manageEntity": {
    "action": "Save",
    "entityId": "1492072459",
    "entityType": "Track",
    "nonce": "0x1a91d9952529a841c85776c54453515df4207ca422d2d93fad50d1ce271f126a",
    "signature": "0xab91dc4ae055e27667d99a48d678647453edd61b1861c1c91e183e903571bdc063ef948a71ff29a84a1f7973c3ddb420de77304c1800cb0cbd2bf32594502add1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}