{
  "manageEntity": {
    "action": "Save",
    "entityId": "1289621670",
    "entityType": "Track",
    "nonce": "0x3dae535ee663787b13c19f0939b105c42421c8db80b79086861b579aa776d738",
    "signature": "0x96345125b3b58dbdf297768508d59239f634faf917e822e4650df88f9a1ca0217d2d9c71fd5515c42aec208d09745b1d765affb6cec2e1e717486a89a2c483351b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}