{
  "manageEntity": {
    "action": "Save",
    "entityId": "807436718",
    "entityType": "Track",
    "nonce": "0x5e750cfbfc0042198eefa83f73a7a293395f3353d95f8eaa0927374558d69201",
    "signature": "0xa4e18e42123803a0f688289ec68f803998bfebbe5c80235a93092460c7848ac7472e210d645ef7b4d6d093c843f1127cc43ed51c68718e36b4775e4e199c41851b",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}