{
  "manageEntity": {
    "action": "Save",
    "entityId": "2074705185",
    "entityType": "Track",
    "nonce": "0x2045555f2abd05e8804d9ab37c6453821fdfb70eec8593429f03bc1a0a471641",
    "signature": "0xf9b2cfe0de92cc61abf6b207c8f2fdbe44406580e47f13628b76d84cdf5ce17b4bf711c7702467826266739f44f42145f4e1d3d5b25a2562c69cbc33bdab69b51c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}