{
  "manageEntity": {
    "action": "Save",
    "entityId": "592963434",
    "entityType": "Track",
    "nonce": "0x2f075bac8d9cfa623b92ec0be4d32d2fad671c747110ab238ef94b2b7c113155",
    "signature": "0xf51e79f1e6a9452bb87b4b5b631c1a1c4fd6d8b227445334c679b1e319bccf573830588f478e6ec4d9056cc82661178674f3b7d1db25cc43eec00d7005e1eaba1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}