{
  "manageEntity": {
    "action": "Save",
    "entityId": "438895",
    "entityType": "Track",
    "nonce": "0xa544495850f11d33e90ec634ece842b9f3ccb34b31428b7112d12e046d10b1db",
    "signature": "0x85545a68807ae6deb4c08625f099303a47a1c2923bcdd6a0c144bc0800643b316c023fb2ac714e79faff82efeb4a864b82b78f33de4cadcc9a784490cba0f8ab1b",
    "signer": "0x97EC3C617a694b06E5b703206e8a911eA15c595d",
    "userId": "590549095"
  }
}