{
  "manageEntity": {
    "action": "Save",
    "entityId": "89409433",
    "entityType": "Track",
    "nonce": "0xa33e2e9b1bfe1d437b38e3bd44be3570cad094204e32eca614bec09ef62c332a",
    "signature": "0x871bbd4f7d7769c83204347fbe1bca51659ec7cd80b2119593debbc7615f17b236f2525a1c0c574c223783d5c7fbba61c39caa6daf683f9f71f8ce03ac39b37b1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}