{
  "manageEntity": {
    "action": "Save",
    "entityId": "1947376460",
    "entityType": "Track",
    "nonce": "0x051f67179bdfbea578862f7283d4a29b9f18f4004c94eadd199994033357e963",
    "signature": "0xa921f7a2239ca1025bb575373ec30c3098f3594ab71ec5fa9eaae7bb14776f7d1d250a4703c5fb69c983632bb937f70ac8c3bc91162d4eb6ba8165fd1a607af61b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}