{
  "manageEntity": {
    "action": "Save",
    "entityId": "2128289222",
    "entityType": "Track",
    "nonce": "0x32100857527168f77b4c0ee9951f4d1200bbf5c8b9c89878399a0308cb77d52e",
    "signature": "0x23da8b6e553634d08176dfbad1808912d8c8a7546c23dd0a40d1fca99f6855c11f72590fdb97fa544b14058c6aba54a06e6ac0903810e0611ceeb786d65e85761b",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}