{
  "manageEntity": {
    "action": "Save",
    "entityId": "156946373",
    "entityType": "Track",
    "nonce": "0xaa87315b430eb2cca844b89e1170e06669859ac050a613520982bb0d347e089e",
    "signature": "0xadde43f6c1d12d836046094e56b02111627369046f276034399d511a543568ff5f706246b3bed41d711b7b0a2efc0f94055b56dc21ecfb91fdd4fb9f41e2a6bf1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}