{
  "manageEntity": {
    "action": "Save",
    "entityId": "5774175",
    "entityType": "Track",
    "nonce": "0xf8699d84caa3239a9179e36bcd0cd78f133fef8e3a6a0b6f1ad244acaa2d8977",
    "signature": "0x5022bfe50da705b6962ab9cf82d728c05c0fcebd0d46d86667bf289c5bcc52f2372a874bfc74836c678fa9252b679f524727a009da74cdb8a7e5182ca80783581c",
    "signer": "0xC7f1C5c105933bBdAC0c8A3219204f23AD4f3320",
    "userId": "381638009"
  }
}