{
  "manageEntity": {
    "action": "Save",
    "entityId": "1531083820",
    "entityType": "Track",
    "nonce": "0x9f323713dd5dd132e300d6a7bb2263d8c5787e470d56ebfad30d5171c2a588d1",
    "signature": "0xbdd6ba539efe3924d60f267645ac6cfde5ade1b399d341dd3b7e5a421ea8adc06aa69442e4a8ba1c899a36337c9aef2c8dea3a0a00bee4745e7b8466fa98fe861b",
    "signer": "0x720537125Aa4b451266209E0d508D7576a4bAF94",
    "userId": "942771296"
  }
}