{
  "manageEntity": {
    "action": "Save",
    "entityId": "985306",
    "entityType": "Track",
    "nonce": "0x3fd1c72fe305f84bb6df31b5d7442c0b1d3c3105791a31b8970ba8b2980b4a94",
    "signature": "0xf65458b38be760fd61914faaf954335c5298c3ee49a7a117e9e43d29d60b5d580f402d0fd9ea375f71c665a5cdb989054557f2441f63a7d6d96ba9e9295932121b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}