{
  "manageEntity": {
    "action": "Save",
    "entityId": "1057644667",
    "entityType": "Track",
    "nonce": "0x4973c2b988599248f110df7123c3eb4a5ad86a2274a255cd840a31564dfce631",
    "signature": "0x3b2402c55759cd15589d0d26c9cb6af89335564b94adf70c4e5dfbe74256218f4972b7233ef0cfe66bf17c696b200722d89330ce66cd8f65fd6d1d24b00e93881b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}