{
  "manageEntity": {
    "action": "Save",
    "entityId": "181750842",
    "entityType": "Track",
    "nonce": "0xf8278a3f95d4ffae695e42a7a558acdaf040a819d989a307325a4aeca201713b",
    "signature": "0xee3c3b4d43cfeb8a1bc3ba1d02fff3f38f3d4bd410f93d7f11df0944b5254cde130e3df4aa9bbd444a56f31dd24100ed5c5b8ee9d46bba9b4f4753b7f2ca20381b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}