{
  "manageEntity": {
    "action": "Save",
    "entityId": "234288171",
    "entityType": "Track",
    "nonce": "0x16a6f9739c8343979e9fd0818c2c37ff4e0962164a3421af7e62150423e692a3",
    "signature": "0x75d0d92ad369404fe078a7c10e69c476d39d80a5cea2ed8e7d2b1cb4577b0b547d1db56ced5d4b3bef84391b44f8ea8447202ee4ae856283744bfb57e48284601c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}