{
  "manageEntity": {
    "action": "Save",
    "entityId": "1665427090",
    "entityType": "Track",
    "nonce": "0x3815e2838f662233cfcc904fb2b8194081fdd6dbf29d2634bd20f70ba4fcf1ea",
    "signature": "0xdfbf3c1ac0ae411f80d64c3d333ff8393a17894af8d3b6d8b2a9b643d3a4cf2e761a6d4def2e247945f070780d1c879bbd2f4e95926fa684dcbf5d74387b45261c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}