{
  "manageEntity": {
    "action": "Save",
    "entityId": "727209260",
    "entityType": "Track",
    "nonce": "0xa6178bd3f6db8c5542aaa8ab50eeb494b2d94b0d902858ee547b8f171cc52226",
    "signature": "0xdbb0b0068344cbe3fca71efb820dbe9d3150eb8d1cde2d35ad573d5de3bd3a50653cbb660e4cfea9a927c2314c41a35fcc8896a81ef8599ba16460d12d61393a1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}