{
  "manageEntity": {
    "action": "Save",
    "entityId": "1818369117",
    "entityType": "Track",
    "nonce": "0xacc3aac551a4be809a42c10f47ccb5740ac9c056e90c2804e1df97edec7a5b18",
    "signature": "0x2adf2eb84258d1e5e2dcb2d23ca9f556f797767f4444e335f18cc98b857dd8411d52ac120a900d18250d54c0a71f700fb0b696799aacc7b6ebff6b90527cfff31c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}