{
  "manageEntity": {
    "action": "Save",
    "entityId": "984420982",
    "entityType": "Track",
    "nonce": "0x273ee6d81a8a10fd6725f7a343ca3d68f399b48945b5705cde706dd670a373d1",
    "signature": "0x226284da2eca5505faf776a78878b8b2f99e833a3c804105f57c9e3e6d2e589f49a5f17f399759f2cc6dd7455b6fbdd8756c7ad351ca9cf72eea8ef8c2d481dc1c",
    "signer": "0xa4A8a4853051b18e0f0f777693Ce34CF4bCe9385",
    "userId": "634886384"
  }
}