{
  "manageEntity": {
    "action": "Save",
    "entityId": "1552180559",
    "entityType": "Track",
    "nonce": "0xaf6a7d45228d558d6f69d09d6e1d81e56165a6f2187bdcbd899326bd521fc9a5",
    "signature": "0x367ab2fe674d4384ed81e0a716437a5360327f36bfcd9322f8c86ea3df808a2939e2809b4ec0ba0eddce3df2170bc94659c4f523a1596b1f61e7cfb784bdb4451b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}