{
  "manageEntity": {
    "action": "Save",
    "entityId": "1731343243",
    "entityType": "Track",
    "nonce": "0xb45962bf53b4ec7b9c59bcfd0db8d72debfb68b98ddca15b6b493930c2e97521",
    "signature": "0x4c3a91568ab9c3c1303c270f4a380bd466c10fe2c56591e8ed241589ed7710303dd9b21bbfc768fbdb60495a22a3490d6c758d8fb6d921e6859b480132fc6bee1b",
    "signer": "0x767f09338Ac6CE8645c0a76a17a560429b582132",
    "userId": "520958130"
  }
}