{
  "manageEntity": {
    "action": "Save",
    "entityId": "584727030",
    "entityType": "Track",
    "nonce": "0xf9868e7602b707704535180079d177d3087c15aa490cc6404165132ed6869253",
    "signature": "0x06153fd63e5c610656106bf856ab5ded9acdfe7fdab82c89723073ea386c6ecc72809f8e9ff0e75abf553b967b800ac7b95e121530f4455da584c16ad67f366f1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}