{
  "manageEntity": {
    "action": "Save",
    "entityId": "22868675",
    "entityType": "Track",
    "nonce": "0x854b8e591b72c443ea5330ee457fbdc6b03016317672d581823a71190a814b0e",
    "signature": "0xafda265588c8ba24d0ac8eec154ac575aa960ce55dc11f018397095a93cbf63b4716c02fdddd0a0e91e42c2c9dde00e15cb91ed9022152f021f39e37b14934081b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}