{
  "manageEntity": {
    "action": "Save",
    "entityId": "1817554841",
    "entityType": "Track",
    "nonce": "0x89b2025f2b4ae09b65d6c7579dd0800be32de0839825cab9f6381d6444dd6975",
    "signature": "0x3a240ccf79351758e14bb151aae1372239bb8c4892a68a8e950719a906dc7be93ac3498ee75d4038de5ad498d6548bc7c1c27881d05854b62ae8f014c3ac069d1c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}