{
  "manageEntity": {
    "action": "Save",
    "entityId": "543972270",
    "entityType": "Track",
    "nonce": "0xd2840f69b843295b8773d78b059aeaa1dec287052af678aa3ce9f8dd7c6030fc",
    "signature": "0x3d103b9495fefb325bcff32cfd571ee9905a97592f5e4f3821be2fe71657c5f70a6a0875d7c50738d31be43f96caf78b8f7a739887916b6d48e5e0e8dc566b8d1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}