{
  "manageEntity": {
    "action": "Save",
    "entityId": "472251566",
    "entityType": "Track",
    "nonce": "0x47825d90ec3cb210ba2e0d8a61d5c82909af6584aea5cd4c665a127a5705dbe1",
    "signature": "0x25dafb890392c14dd43ef19d4dd3827dc53c360c249350caf8eeb289562739d62e5245f24fd786a4f0baca878697cde8984cd15b9ee3013f1d84a0be8c4d0c0c1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}