{
  "manageEntity": {
    "action": "Save",
    "entityId": "861103023",
    "entityType": "Track",
    "nonce": "0xe01099fe07c6baee08575f4946dbaa1262f8e395c2cbaf80d396de07fe5a6e0e",
    "signature": "0xd1a267f1ac69af12bc4db004f0679f809740b9c13f897fb29366acc0a8b07c9b317cd3a28437150efbcf3fa8ad2b618d8460d5337f4963292c43c6d29330a3421c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}