{
  "manageEntity": {
    "action": "Save",
    "entityId": "2115707514",
    "entityType": "Track",
    "nonce": "0x99729d305664792687d1014211872fb53ca40839bf1813ac3c4c40b6d19935e5",
    "signature": "0x6706c9f5bf0a4fa194aff4971944218222bc9022388da4cd47c4eea6c38c24a610ef8c48ea8615b763494bd1caeee0ebb23a356dc6136438afabe8d765e0cdfa1c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}