{
  "manageEntity": {
    "action": "Save",
    "entityId": "763893428",
    "entityType": "Track",
    "nonce": "0x3df5dd2c795d6f86505ff4d889ef2def39eb43b9f92c92e01d7d025870c43dc6",
    "signature": "0x1a9e30e58e1a6ceb4640977f88d74243481da64cadf3058d15bb98dfd1bddd3a6238afe6e93b230081e4e8b2b28491aa45c1132aa11ea99a8c375011d3467c861b",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}