{
  "manageEntity": {
    "action": "Save",
    "entityId": "814305",
    "entityType": "Track",
    "nonce": "0x276ba15ff9d333e6af9c9266b799be105df035066a7010436829c0c859b3ed83",
    "signature": "0x9569bdb5e17f62234c19b83c2a5d07c2d11f46246531336a792078bf75c5ff2e6eed72cf720ee1b4a805ddb122de696a838f00dfc1e99364d5133514811cf0d01c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}