{
  "manageEntity": {
    "action": "Save",
    "entityId": "636395",
    "entityType": "Track",
    "nonce": "0xa9110fccc61feeba7a152205cf1784bef3412bac3e838d8af5293ad15e63b364",
    "signature": "0x3969f2e3fcceb03fb8353b6ba2dad692d6a3be2d278fe72a3e473504660939a653a4c913d643a071993fd1d4e2308b30881bec7cee2af110bc1e0991ccee27001b",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}