{
  "manageEntity": {
    "action": "Save",
    "entityId": "1991154962",
    "entityType": "Track",
    "nonce": "0xced2c0e167207b4bea3f96a188ea616f3adbd68a5df6852fea0a98816a3181e7",
    "signature": "0x2ea8427aef5d0315efbfdb7a5efa1baa1c7664c30946240f554845e6732c4a8d1c8aa69ce53d7b2561eb9e923bbea05b5b2f473f60f37bbf041d85671972df241b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}