{
  "manageEntity": {
    "action": "Save",
    "entityId": "1021370687",
    "entityType": "Track",
    "nonce": "0x999b67b4451f9d189510ceb18b8370f489cb8fc6c3e9f10e337834ea3b6d925a",
    "signature": "0x3798139917c4de539d7c94607d3153d510a334e8b1f25e7419ea21b0f435b6663daf7fea173a488ce0f33ffd7335089916b4d4ccdfe13ddbcb207ddfe487706e1b",
    "signer": "0xBBBE9eFc177a4E708d317195Fa81aA6E8E2F7E92",
    "userId": "557135181"
  }
}