{
  "manageEntity": {
    "action": "Save",
    "entityId": "892842746",
    "entityType": "Track",
    "nonce": "0x5872247b67799c7b18def51dc83dfdd0b2ee86153885233dc35817c6130fbb56",
    "signature": "0x8e2139a1e1063fba9b83d4373073a92cb63d4a23d1db0daad57ce69273bdb6ec0753bed231c66181e89f92d44ffb1b3c1dd50a3742a02e86febbc391d9fb07b41b",
    "signer": "0x344Cc6Cd6326A3Fc46e2f789e02111af483Df673",
    "userId": "980331"
  }
}