{
  "manageEntity": {
    "action": "Save",
    "entityId": "2125849462",
    "entityType": "Track",
    "nonce": "0xe3afbe1382beee48721ddd70c404cd58b76266d761c48d180ec1b0189bb8342a",
    "signature": "0x340fe8a061b7ff7d874e9dfb1f44f6dc01e37653592372ebb67d1f8287c8bcf524b4e5e03f860cdaa32d6a8a33b8e9f6e09fd6b1fa2e4eeab4d7aadba4905cc71c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}