{
  "manageEntity": {
    "action": "Save",
    "entityId": "159192406",
    "entityType": "Track",
    "nonce": "0xd34585213bebd2d4cc3a4fe3dc2733e442f625bbe2008e59f6990fe1e4630f50",
    "signature": "0x981d469a3b34edd860eb16a83f44c4758460730ed0077ccd5f62c5d232cc0d331ad2543c316c33782e204b8d25c27fa022857f3cc579f878a81432b61ff02a371c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}