{
  "manageEntity": {
    "action": "Save",
    "entityId": "496686",
    "entityType": "Track",
    "nonce": "0xffa474d800f85f2121a82cc71a40dcd658bd15e79a11163bc06e60f398ade0ba",
    "signature": "0xce7a382bb0164ea3d7f3ffc4bb684f1acdaf0ab09dd81f5bf7f2df741c7760da7c9ea453d3832beae361e93f881737167bd61564dfc9b4da75b7ded92b2238b21b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}