{
  "manageEntity": {
    "action": "Save",
    "entityId": "299841646",
    "entityType": "Track",
    "nonce": "0xe2dd1a8afe5f1e526030dfd47e863dc812da2921b43bb8daf983aba45cc14ffb",
    "signature": "0x4e20c931585b7af57fb15d3998e7df7b9f255d61288b73cf7a6ebbdd655af0214d888e9c622fb1882e7114e5134c8a390fb1799f4634cfb7400377cd85c536971c",
    "signer": "0xAaC77705f5f6bd787D8581c36Ddaf7c0c7AE3370",
    "userId": "827420993"
  }
}