{
  "manageEntity": {
    "action": "Save",
    "entityId": "1249397863",
    "entityType": "Track",
    "nonce": "0xdca654d3031fa1930107f310eb7e5df28462966e2c270e74e739a143ad0c1489",
    "signature": "0xf663478d5ed289da29babcf7164538121aa883c92d1fae3e2dc5efadf33f921144526f66407aa6e83dc8b87cbccd3a2167f3eabe2e85dc93b2532cbf6d0048aa1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}