{
  "manageEntity": {
    "action": "Save",
    "entityId": "357909",
    "entityType": "Track",
    "nonce": "0xcd3590aa8f969abb934a6ca33d80b135ed5ecc3bca257d1c58cbf179a93b698e",
    "signature": "0x0887430c6e6db890b47f3617e6e904ed4b2a48d87198f754c121b7d88712a1e575d96f33fcff49cc8e7cdea339d80134f25f2bf56742ab520fc5b9243197bed31c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}