{
  "manageEntity": {
    "action": "Save",
    "entityId": "276911668",
    "entityType": "Track",
    "nonce": "0x81f0a8667505497a52f0489085e34bca1dbc4fa4bb85fb668f5abb5ea55100a3",
    "signature": "0xf41c9ce739bb624b79a27ee069c8814367ba5bdca1b73736f099763571679e2a68532f40b2991ea0b6290ccdf9da53f8eca6d237732f8a7a5cb62e74569dd7221b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}