{
  "manageEntity": {
    "action": "Save",
    "entityId": "199365",
    "entityType": "Track",
    "nonce": "0x2f3b51ddeb3c4198823f6569fdf21f491a3b068640aebb0bcd356525d828cc95",
    "signature": "0x39d2e3771d542b65d06fe7db534372f6c7ce4e28f0ea3be26b5e3b7f84ea5ddd2ad26cb543e76cbb5fea0d1b102708dfab23cbcdb43e5df4063477a3247febcb1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}